In 1982, ADP-ribosylation factors (ARFs), a family of GTP-binding proteins associated with Golgi complexes, were initially recognized based on their ability to stimulate the ADP-ribosyltransferase activity of cholera toxin in vitro, and named so. In fact, this pathophysiologic activity has been useful for functionally defining members of the ARF family. However, during last decade, genetic and biochemical studies have shown the physiologic role of ARFs that also play an essential role in intracellular vesicular transport, particularly in Golgi complexes, activate phospholipase D activity as a nod of signal transduction of cells. Moreover, their more functions were revealed continuously recently. Especially, human ARF1 was found earliest, and studied profoundly in human body cell. Therefore, in this article, there is a comprehensive review about its regulators and effectors, functions and its possibilities involved in tumorigenesis, development of tumors.

OBJECTIVE: To evaluate the preoperative virtual CT endoscopy about the simple congenital middle ear malformations and its clinical application. METHOD: Thirteen cases (16 ears) with simple congenital middle ear malformations were undergone high resolution CT scannig to collect the original image data, followed by 3-dimensional reconstruction to process the images to evaluate the possible lesions of the ossicular chain. Then, a comparative analysis was made between the finding of virtual CT endotoscopic and the finding that actually found during the operation of the ossicular chain lesions. RESULT: We found malleus and upper strcture of incus abnormity or embeded in upper inner wall of atticus in 5 ears; malleus, incus and stape all abnormity or absence in 3 ears, in the former two conditions we both selected auricular incision through attic pathway remaining intact canal wall; we found crus longum incudis hypoplasia orstructure suprastapedialis absence,stapes aberrance or absence in 8 ears, then we selected vestibular window fenestration and artificial stapes surgery. Postoperative external auditory canals and tympanic membranes were intact in 16 ears,and speech frequency hearing improved by average of 25-45 dB. The coincidence between virtual CT endoscopy and the ossicular chain abnormity under operating views were 100% in cases with congenital ear deformity. CONCLUSION Virtual CT endoscopy is a reliable reference for preoperative evaluation on congenital middle ear malformations.
Adolescent ; Adult ; Ear, Middle ; abnormalities ; Endoscopy ; Female ; Follow-Up Studies ; Humans ; Male ; Tomography, X-Ray Computed ; Young Adult

The dialysis for three species of poplar stems apoplast was obtained by microdialysis method, and then the concentration of Na+, K+, Ca2+ in the dialysis sample was directly measured by graphite furnace atomic absorption spectrometry ( GF-AAS) . The flow rate of perfusate was 1μL/min and the cut-off molecular weight of probe was 30 kDa. The real-time and non-destructive test technique established for the detection of ion concentration could be applied in research of poplar biochemical physiology. The recovery of the proposed method was 95. 8%-103. 1%. The contents of sodium ion in Populus wutunensis, Populus simonii and Salix matsudana were 1034-1156 μg/L, 1493-1611 μg/L and 1586-1703 μg/L; potassium ion were 1012-1237 μg/L, 941-964 μg/L and 1095-1201 μg/L; calcium ion were 4976-5237 μg/L, 4786-5042 μg/L and 5893-6142 μg/L. The method could provide reliable data for the study of ion concentration changes of plant response to adapt to all kinds of external environment.

Objective To evaluate the dose distributions with different dose rates, and approach a reference to the dose rate for radiation. Methods Three classic static intensity modulated radiotherapy (IMRT) plans of prostate cancer, lymphoma and nasopharyngeal carcinoma were chosen for the study. For each plan, the dose verification of three different dose rates (100, 300 and 600 MU/min) was performed with the Varian 600CD linear accelarator by using the 2-DICA of I'mRT Matrixx. With the Pinncale planning system, each segment was used as a beam to form another IMRT plan. The OmniPro-I'mRT V1.6 was applied to compare the segments in the two IMRT plans, and then the actual weights were obtained. The simulated plans at different dose rate were designed when setting the weights back into the planning system. Results With the increase of dose rate, the passing ratio of the verification decreased and the D_(max), D_(min), D_(mean) and D_(95) of the planning tumor volume increased. The high dose area expanded significantly in target regions, and the 95% isodose line extended. At the dose rate of 600 MU/min, The D_(95) of GTV_(nd) in nasopharyngeal carcinoma increased by 5.33% than the original plan with the V_(110) up to 19. 38%. The irradiation dose of the organs at risk (OARs) increased. For the case of lymphoma, the V_(20) of the lungs in the original plan and the three simulated plans were 31.77%, 32. 11%, 32.60% and 33.26%, respectively. For the case of nasopharyngeal carcinoma, the V_(30) of the right parotid were 48.75%, 49. 56%, 51.65% and 53.91%, respectively. Conclusions With the increase of dose rate in static IMRT , the actual dose distribution deviates the original plan , and the high dose area and the OARs dose increases. The higher dose rate is suboptimal when the dose of the OARs is proximate to the tolerance limit.

Objective To summarize the types and imaging features of periosteal anomaly in osteosarcoma.Further to seek the feature of genesis and advancement of periosteal anomaly and its clinical significance.Methods One hundred and twenty-eight patients with osteosarcoma were enrolled in this study,which consisted of 76 males and 52 females aging from 5 to 66 years old with an average of 19 years.Both x-ray plain film and MR images were obtained in all patients.and DWI were done in 23 patients.CT scanning was conducted in 48 patients.which included post-contrast scanning done in 36.The pathological gross specimen,macrosection and point-to-point microsection were obtained in each of 14 cases to correlate the imaging findings of periosteal anomaly to the pathological outcome.Results The imaging and pathological finding:(1)Periosteodema,occurring in 96 patients.The sign was merely demonstratable on MR image and presented as loosened periosteal structure with no tumoral infiltration pathologically.(2)Periosteal lift and thickening,demonstratable on both CT and MR image,including 13 noted on CT and 42 on MR image.Pathologically,non-tumoral infiltration was noted in the thickened periosteum.(3)Periosteal destruction,occurring in 48 patients.Periosteal destruction was merely demonstratable on MR image and presented as localized or generalized tumoral infiltration of the periosteum.(4)Linear periosteal neo-bone formation,demonstrated in 42 cases on plain films,13 cases on CT and 22 on MR images,respectively.The linear periosteal neo-bone formation was pathologically regularly arranged periosteal neo-bone.(5)Laminar periosteal neo-bone fomarion,demonstrated in 21 cases on plain films,6 cases on CT and 21 on MR images,respectively.Pathologically,it appeared as multi-layer arrangement.(6)Radiated and spiculate periosteal neo-bone formation,demonstrated in 13 cases on plain films,7 cases on CT and 14 on MR images,respectively.On both plain film and CT,the closer to the center of the tumor,the longer and denser the spicule was.The interspiculate structure was tumoral tissue pathologically.(7)Periosteal neo-bone formation of mixed type,demonstrated in 7 cases on plain films,4 cases on CT and 8 on MR images,respectively.It was composed of 2 types or more of periosteal neo-bone.Conclusions (1)Multiform periosteal anomaly can be induced by osteosarcoma,and difierent periosteal anomaly possesses different imaging findings and different pathological basis.(2)The pathologically-based classification of periosteal anomaly generalizes the 3-modality imaging findings of various periosteal pathological alterations.(3)MR imaging enables to demonstrate periosteal anomaly more early,and periosteodema and periosteal destruction without neo-bone formation can only be demonstrated by MR imaging.MR imaging is more sensitive than CT in displaying periosteal thickening.

Objective:To fabricate and to study the surface morphology and biological safety of a novel coating on microarc-oxidized titanium.Methods:The novel functional coating was fabricated by cross-linking the double-layer nanoparticles loading rhBMP-2 and SDF-1 with gelatin on microarc-oxidation coating on titanium implant surface.The surface topography was observed and optimized,and the biological safety of the novel coating was primarily evaluated by cell toxicity test,oral mucosa stimulation test and hemolysis test in vitro.Results:The novel functional coating possesses excellent morphology.The coating showed the cytotoxicity of score 1 and no mucous membrane irritation,the hemolytic rate of the coating was 4.6％.Conclusion:The coating possesses good morphology and biological safety.

Objective To explore the effect of the transplantation of intact follicle by punching with syringe needle on defect eyebrow reconstruction.Methods Fifty-two patients with eyebrow defects due to burn,trauma,resection and inappropriate eyebrow trimming were recruited,35 with bilateral defects and 17 with unilateral defect.The scalps strips from the safe donor area or temporal region were taken and made into 1 to 2 cm long hair with intact follicle under 3 fold magnifier.The recipient area was punched with 21G or 22G syringe needle.Then the hair shaft was clamped with mi croforceps and the follicles were transplanted to the defective area.Results Folliculitis were found in two burn patients after the transplantation and cured by alcohol inunction.Hairs of the rest patients transplanted grew well.The direction and appearance were satisfied.The survival rate of hair was more than 90 ％.Conclusions It is feasible to restore the partial eyebrow defect by intact follicular transplantation by punching with syringe needle and clamping the hair shaft with microforceps.

Objective To investigate the effect of up-regulation of tetraspanin-5 (Tspan-5) expression on the metastatic ability of colorectal cancer (CRC) cells. Methods The coding sequence of Tspan-5 mRNA was amplified from total RNA of LoVo cells by RT-PCR and cloned into pEGFP-C1 to construct Tspan-5/pEGFP-C1,a eukaryotic expression vector. The expression of Tspan-5 in LST-R1 cells was up-regulated by gene tranfection. Western blotting was used to detect the expression level of Tspan-5/EGFP fusion protein,and laser scanning confocal microscopy (LSCM) was used to observe the distribution of Tspan-5/EGFP in LST-R1 cells. The changes in adhesion,migration and invasion ability of LST-R1 cells were determined by adhesion,migration and invasion experiment in vitro,respectively. Liver metastasis model of nude mice was used to test the changes in liver metastasis ability of LST-R1 cells in vivo. Results The Tspan-5/EGFP fusion protein could be detected by Western blotting in Tspan-5/pEGFP-C1 transfectants. LSCM showed that Tspan-5/EGFP protein located in cell membrane. Adhesion and migration assays showed that up-regulation of Tspan-5 expression level significantly promoted the adhesion and migration ability of LST-R1 cells on a series of extracellular matrix (ECM) components,including collagen IV,FN,LN and VN (P

Objective To probe the imaging diagnostic characteristics of skull base-type pituitary adenoma (SBPA). Methods CT, conventional MRI, dynamic MRI, and pathological data of 16 patients with SBPA were analyzed. The manifestations of both CT and conventional MRI, the dynamic time-signal curve, time of peak enhancement, and average enhancement rate were compared between SBPA in the 16 patients and chordoma of the skull base (CSB) in another 9 patients. Results The CT appearances of both tumors were quite similar, offering no differential value. Both tumors were slightly hypointense on T 1 weighted images, but SBPA was mildly hyperintense and CSB was markedly hyperintense on T 2 weighted images. The T 2 weighted signal intensity between both tumors differed significantly (P5 min, (40?5) /min for CSB, respectively (P

Objective To investigate the value of combined use of laparoscopic cholecystectomy(LC)and duodenoscopic procedures in the treatment of gallbladder stones with common bile duct stones.Methods We retrospectively analyzed clinical data of 164 cases of gallbladder stones with common bile duct stones treated with laparoscopic cholecystectomy + endoscopic sphincterotomy(EST)from January 2003 to December 2007.Results All the cases underwent ERCP and endoscopic sphincterotomy(EST)followed by LC.In the 164 cases,196 bile duct stones were extracted from 155cases with a success rate of 94.5%.The procedures were unsuccessful in 9 cases,and among them,4 cases had stricture of bile duct more than 2 cm in length,and 5 cases had impacted stones that precluded passage of the guide wire.After EST,6 of the 155 cases had the complication of mild acute pancreatitis and LC was performed after its treatment.The success rate of LC was 96.5% and the average hospital stay was(11?4)d.Conclusions The combined use of EST and ERCP before LC is effective in treatment of gallbladder stones with common bile duct stones,and has broadened the utilization of minimally invasive treatment for bile duct diseases.