OBJECTIVE:To explore the reason for the "tragedy of anti-commons" in biomedical patent and its effect on the development of biomedical industry.METHODS:The mathematical models of "commons" and "anti-commons" gambling were established based on the analysis on emergence of "patent bush" resulted from the abuse of biomedical patents,and the profit conflict of the patents power related to elementary researcher and applicant researcher was analyzed.RESULTS:The potential "tragedy of anti-commons" affects the enthusiasm of the biomedical researchers,hinders the rapid development of biomedical industry and the improvement of technological level.CONCLUSIONS:The corresponding measures should be taken from aspects such as system,research model,and patent applicant model to balance the possessiveness and exclusiveness,avoid the "tragedy of anti-commons" and facilitate the development of biomedical industry.

Allergens ; immunology ; Child ; Cross Reactions ; Humans ; Hypersensitivity ; immunology ; Latex Hypersensitivity ; immunology

Objective To compare the clinical efficacy and safety between transurethral plasma kinetic enucleation of prostate(TUPKEP) and transurethral resection of prostate(TURP) on benign prostatic hyperplasia(BPH). Methods One hundred and forty two BPH patients were divided into two groups:TUPKEP group (72 cases) and TURP group (70 cases). Seventy two cases aged 52-90 years[mean age (70. 5±7.6) years] with prostate weight of 27-126 g [mean weight (75. 6±10. 3)g] underwent TUPKEP, and seventy cases aged 51-87 years[mean age (70. 2±6. 8) years] with prostate weight of 25-118 g[mean weight (73.8±9.9)g] underwent TURP. There were no significant differences in age, weight of the prostate, international prostate symptom score(IPSS), residual urine volume(RUV) ,maximum urinary flow rate (Qmax) and quality of life (QOL) scores between the two groups before operation (t=0. 2873, 1.0612, 1. 0832,0. 9522,0. 0000, 1. 0774;P=0. 7743,0. 2904, 0. 2806,0. 3426,1. 0000,0. 2832). The operative time, intraoperative blood loss, the preserved time of installing catheter, hospitalization time, postoperative morbidity rate and efficacy were compared between the two groups. Results The operation success rates were 100. 0% (72/72) in TUPKEP group and 98.6% (69/70) in TURP group. The average operation time were (46.2±6.4)min and (58. 4±9. 6)min (t±8. 9404, P=0.0000), and the mean intraoperative blood loss were (105.9± 12.2)ml and (148.6±14.3) ml(t=19. 1608, P=0.0000) in TUPKEP and TURP groups respectively. The mean preserved time of installing catheter were (3. 5±1.0)d and (5.0±1.0)d(t= 8. 9364, P=0. 0000), and the average hospitalization time were (5.1±1.9) d and (7.0±2.6) d (t= 4. 9819,P=0.0000)in the two groups, respectively. In TUPKEP group, there was one case of temporary urinary incontinence, two cases of secondary prostate hemorrhage and one case of external orifice stricture of urethra, with a complication rate of 5.56%. In TURP group, there were two cases of transurethral resection syndrome (TURS), one case of urinary extravasation, two cases of temporary urinary incontinence, three cases of secondary prostate hemorrhage and two cases of external orifice stricture of urethra, with a complication rate of 14.29% . Compared with preoperation, Qmax was obviously increased and IPSS,RUV, QOL scores were decreased after follow- up for 3 months, but there were no significant differences in these parameters between the two conditions(t=1. 1131,0. 2543,1. 2959,0. 7252;P=0. 2676,0. 7996,0. 1971,0. 4696). Canclusions TUPKEP and TURP have similar efficacy in the treatment of BPH, but TUPKEP is a method with shorter operation time, less blood loss, lower postoperative complication rate and more safety than TURP.

Formate dehydrogenase(FDH)coding gene was amplified from genomic DNA of Pichia pastoris by polymerase chain reaction, and the codon TAG(bases 649-651)was mutated to GAG using site-directed mutagenesis.The recombinant plasmid pET-FDH was con- structed by inserting the mutated DNA fragment into expression vector pET-22b(+),and transformed into E.coli BL21(DE3).FDH was expressed as a form of soluble prutein fused with 6?His tag at high level through IPTG induction.The amount of FDH was up to about 30% of the total cell protein.The cells-free crude extract was purified by one affinity chromatographic step,and resulting enzyme preparation revealed a specific activity of 6.45 U/mg.

Objective To explore the clinical significance of the precision evaluation of computed tomography angiography and color Doppler image formation technology to the condition of the vascular system in the donor site.Methods From January,2014 to December,2014,CTA and color Doppler were used to examine conditions of the first dorsal metatarsal artery's courser and the size of original caliber in 25 patients with thumb or finger defected.Also the distance between skin and the first dorsal metatarsal artery.The accurate positions and adjacent relations of vessels in donor site were precisely marked and then the vessel original caliber was measured.Results All the first dorsal metatarsal arteries of 25 cases can be appeared clearly in CTA and color Doppler.Blood vessels line and filling results were completely consistent in intraoperative findings.The difference of the vessel original average caliber was statistically significant (P ＜ 0.05) (1.20 ± 0.25 mm,1.41 ± 0.15 mm and 1.3 ±0.2 mm in Doppler,CTA and operation,respectively) while the distance was not significant (P ＞ 0.05)(9.20 ±3.06 mm,10.32 ± 2.76 mm and 0.2 ± 2.6 mm in Doppler,CTA and operation,respectively) All the 25 transplanted toes were survived.Conclusion CTA combined color Doppler image formation technology in thumb or finger reconstruction can objectively reflect the real situation of the vessels in donor sites,and the structural characteristics and classification of anatomy for individualized,and has important clinical value in preoperative foot blood supply assessment.

OBJECTIVE:To establish the method for the simultaneous determination of anticancer activity components of flavonoids from Hedyotis diffusa,i.e. quercetin,kaempferol. METHODS:HPLC was applied to determine the contents and performed on Alltima C18(250 mm?4.6 mm,5 ?m) column. Mobile phase consisted of methanol(A)-0.5% glacial acetic acid,(gradient elution). The detection wavelength was aet at 350 nm. RESULTS:The linear range of quercetin was 0.006 2～0.244 0 ?g(r=0.999 8)and that of kaempferol 0.007 8～0.310 6 ?g(r=0.999 9). The average recovery of quercetin was 101.84%(RSD=1.79%,n=6) and that of kaempferol 99.04%(RSD=2.90%,n=6). CONCLUSIONS:The method is simple,accurate and reproducible for the quality control of H. diffusa.

Bronchogenic Cyst ; Child ; Humans ; Male ; Neck ; pathology ; Young Adult

Adolescent ; Cranial Nerve Neoplasms ; Facial Nerve ; Humans ; Male ; Neurilemmoma ; Parotid Region ; pathology

AIM:To construct adenovirus vector expressing mice B7-H1 gene, transfect dendritic cells ( DCs ) , and to study the therapeutic effect of modified DC on thyroid-associated ophthalmopathy ( TAO) in mice.
METHODS: We designed and constructed B7-H1 gene adenovirus expression vector, and transfected DCs from mouse bone marrow, tested the phenotype and function of modified DCs, identificated its negative regulation to immune responses. The modified DCs were infected the sicked mice. And then the immunotherapeutic effect of modified DCs to TAO were tested.
RESULTS: B7 - H1 gene adenovirus vector was constructed and transfected DCs from bone marrow. The titer of the recombinant adenovirus was 1. 8í109 PFU/mL. B7-H1 gene modified DCs characteristics of regulatory DCs, could inhibit positive immune responses. The inhibition proceeding of TAO into mice infected modified DCs, was obviously prior to the control mice. The gene modified DCs, maybe become the new immunotherapy biological agent to thy TAO.
CONCLUSION: We constructed the expression of mouse B7 - H1 gene adenovirus expressed vector successfully, transfected DCs, by vector have properties of regulatory DCs, inhibiting positive immune response and the occurrence and development of thyroid eye disease. Gene modified DCs, reveal potent to the treatment of thyroid eye disease.

Objective To assess the optimal visiualization capacity of brachial plexus with three-dimensional nerve-sheath signal increased with inked rest-tissue rapid acquisition of relaxation imaging (3D SHINKEI), exploring the feasibility of preliminary diagnostic value on brachial plexus diseases. Methods MRI scans were performed on 24 healthy volunteers with no history of brachial plexus injury, and 46 patients whose outcomes of lesions had been verified as post-ganglionic brachial plexus injuries by surgery or clinical follows-up . The scan series consist 3D SHINKEI, STIR in the coronal plane as well as DW-MRN in the axial plane using a 3.0 T MR system. The source and post-processed images of 3D SHINKEI and DW-MRN were scored according to the optimal visibility on brachial plexus, in the meanwhile, contrast-to-noise ratio of the original images in the 3D SHINKEI and STIR sequences were calculated separately. Two radiologists blindly compared the detection rate of positive brachial plexus injuries between 3D SHINKEI and STIR in 46 patients. And then analyze the outcomes by means of Kappa test, Mann-Whitney test , independent sample t test, and Chi-square test. Results Post-ganglionic brachial plexus showed high intensity in the 3D SHINKEI sequence. In the 24 healthy volunteers, the scores by the two radiologists were 3.6 ± 0.6, 3.5 ± 0.6, 3.0 ± 0.2, 2.9 ± 0.1, respectively. There was statistical difference between the two sequences (Z=2.667,P=0.008,P<0.05). And the Kappa was 0.8 and 0.6 with favorable consistency. The CNR of 3D SHINKEI and STIR were 0.61 ± 0.07, 0.42 ± 0.03 (t=12.78, P=0.001, P<0.05). The positive detection rates of post-ganglionic brachial plexus injuries on 3D SKINKEI and STIR were, 78.3%, 52.2%(χ2=9.421, P<0.05). Conclusions 3D SHINKEI sequence demonstrates robust visibility consistently and can clearly display the structures and signals of post-ganglionic abnormality, compared with DW-MRN and STIR. This technique can be helpful to provide more complementary information to further confirm the diagnosis of brachial plexus injuries.