BACKGROUND: Presently used biological factors for inducing bone marrow mesenchymal stem cells (BMSCs) do not obtain mature chondrocytes. Cartilage tissue engineering using BMSCs as seeds does not collect tissue-engineered cartilage, which has value in the clinic. The obtained tissue is cartilage-like tissue. OBJECTIVE: To screen differentially expressed genes between rat BMSCs and chondrocytes by microarray. DESIGN, TIME AND SETTING: The cytology gene study was conducted at the Central Laboratory, First Affiliated Hospital, Dalian Medical University in July 2007. MATERIALS: A total of 8 healthy Sprague Dawley rats aged 2 months were obtained from Animal Experimental Center, Dalian Medical University. 27K Rat Genome Array chip was supplied by Bo’ao, Beijing, China. METHODS: Rat BMSCs and chondrocytes in the aural region were sterilely isolated and cultured in vitro. Total RNA was extracted and purified using Trizol one-step method, and transformed into double chain cDNA probe following reverse transcription. Cy5-dCTP and Cy3-dCTP were used to label BMSCs and chondrocytes, which were hybridized and washed. The fluorescent signals were scanned by a scanner. The values were analyzed and calculated by GenePix Pro 4.0 software. MAIN OUTCOME MEASURES: Gene expression spectrum chip hybridization results. RESULTS: Among the differentially expressed genes (2 times difference), BMSCs as controls, upregulated and downregulated genes were 1 226 and 888, respectively. There were many differential expression gene of BMSCs and chondrocytes. Cy5/Cy3 20 genes are defined as significant differential expression gene. Thus, two important cytokines were found: chondromodulin and connective tissue growth factor. CONCLUSION: The gene chip technique provides an ideal method for screening cytokines during study of tissue-engineered cartilage. Cartilage regulin and connective tissue growth factor highly express in chondrocytes, which indicated that the two have closely association with the differentiation of BMSCs into cartilage.

Objective To introduce a method of reducing the postoperative syndrome of the uvulopalatopharyngoplasty(UPPP). Method UPPP was performed for 23 patients with obstructive sleep apnea hypopnea syndrom operation(OSAHS). Before or after the operation, dexamethasone was injected in oropharynx to control the edema of the oropharynx which caused by UPPP. Results Less syndrome had been occurred in these patients. Conclusion The edema of the oropharynx which caused by UPPP can be controlled by injecting dexamethasone in oropharynx. It can reduce the risk of the UPPP, and make the operation safer and more efficient.

OBJECTIVE To compare different methods of processing of homograft costal cartilage. METHODS Homograft costal cartilage samples were processesd by three methods-irradiation, freezing, and alcohol fixation-before being inserted into the rabbit nasal dorsum. They were taken out 12 weeks later and evaluated for histological responses under a optical microscope. RESULTS The histological responses consisted of inflammatory cell infiltration, necrosis, vasal responses and fibroplasia. The was a significant different in degree of inflammatory cell infiltration and necrosis in all three groups(P

OBJECTIVE To investigate the effect of repeated debridement on the efficacy of endoscopic sinus surgery(ESS). METHODS A total of 67 patients underwent ESS were divided into intervention group and control group. Debridement was performed at the 1st, 4th, 8th week after operation for the patients in intervention group, while once per week for the patients in control group. The primary outcome measure was visual analogue scale(VAS)and Lund-Kennedy endoscopic score(LKES). RESULTS Comparing the two groups on all domains of digital VAS and LKES at the 4th, 8th week after operation, there were no significant difference between the two groups. CONCLUSION Benefit of frequent debridement during the early postoperative period was no positive correlation with patients recovering after ESS. Therefore, in terms of subjective recovery and health care costs,appropriate extending postoperative management time and decreasing intervention frequency do not decrease the efficacy of endoscopic sinus surgery.

OBJECTIVE:To establish a method for the determination of related substances in Pantoprazole sodium for injec-tions. METHODS:HPLC method was adopted. The determination was performed on Kromasil Hypersil ODS column with mobile phases consisting of 0.01 mol/L potassium dihydrogen phosphate buffer solution(pH adjusted to 7.0)-acetonitrile(gradient elution) at a flow rate of 1.0 mL/min. The detection wavelength was set at 290 nm,and the column temperature was 40 ℃,and injection volume was 20 μL. RESULTS:The linear ranges of impurity A,impurity B,impurity C+E,and impurity D were 0.4168-1.0420μg/mL(r=0.9998),0.1950-0.4875 μg/mL(r=0.9999),0.3890-0.9725 μg/mL(r=0.9998),0.1986-0.4965 μg/mL(r=0.9998), respectively. The limits of quantitation were 0.834,0.780,1.556,0.794 ng/mL;the limits of detection were 0.417,0.390,0.778, 0.397 ng/mL,respectively. RSD of precision test was lower than 1.0%;in repetitive test,RSD for total peak area of impurity was lower than 1.0% ;the recoveries were 98.81% -102.49%(RSD=1.18% ,n=9),95.31% -98.44%(RSD=0.91% ,n=9), 96.88%-98.44%(RSD=0.52%,n=9)and 97.87%-101.28%(RSD=1.05%,n=9). CONCLUSIONS:The method is convenient, accurate and suitable for the determination of related substance in Pantoprazole sodium for injection.

OBJECTIVE An understanding of the complex anatomy of the anterior skull base is crucial for the surgeon doing endoscopic surgery. The anatomic data of the olfactory sulcus and adjacent structures in Chinese patients were defined using 3-dimensional reconstruction images. The surgeon is encouraged to develop a detailed pre-operative surgical plan by utilizing these dynamic anatomical observations to avoid intracranial injury. METHODS The paranasal sinus CT scanning images of 100 adults were reconstructed for observation using EBW2.0 software and multiplanar reformation. All data obtained were in the coronal plane from the anterior point of the olfactory sulcus. The cribriform plate depth as compared to the ethmoid roof and adjacent structures, was measured bilaterally. Data obtained on adjacent structures include the vertical height of the lateral lamella of olfactory sulcus, the horizontal distance between the cribriform plate and the orbital lamella, the length of the middle turbinate, the height of the orbit, and the vertical distance between the cribriform plate and the nasal floor. RESULTS The olfactory sulcus was classified into three types: platform type (60 %), sloping type (17 %) and mixed type(23 %), as distinguished from Keros classification. In this study the vertical height of the lateral lamella of olfactory sulcus was (5.03 ± 0.17) mm (R) and (5.39 ± 0.19) mm (L) in platform type, and (2.79 ± 0.49) mm (R) and (4.72 ± 0.49) mm (L) in the mixed type. There were statistically significant differences between the right side and the left side in these two types (P＜0.01). The horizontal distance between the cribriform plate and the orbital lamella on the same side was significantly different between the platform type and the mixed type of olfactory sulcus. A similar result was observed for the vertical distance between the cribriform plate and the nasal floor. Gender differences exist in the horizontal distance between the cribriform plate and orbital lamella on the same side and the vertical distance between the cribriform plate and the nasal floor. CONCLUSION Different types of olfactory sulcus have distinct characteristics, hence care which must be taken into account when doing endoscopic surgery.

BACKGROUND:Chondromodulin-Ⅰ is expressed mainly in the cartilage, but it is little expressed in mesenchymal stem cells. Combined with the previous study of our group, we concluded that chondromodulin-Ⅰmaybe play an important role in inducing mesenchymal stem cells into chondrocytes accurately.
OBJECTIVE:To construct an expression plasmid stably carrying chondromodulin-Ⅰ to up-regulate the expression of chondromodulin-Ⅰ in bone marrow mesenchymal stem cells.
METHODS:Specific primers were designed in rat cartilage for chondromodulin-Ⅰ gene, then the pcDNA3.1 (+) plasmid expression vector was digested by enzyme and directional connected gene to construct pcDNA3.1(+)/ChM-Ⅰ expression vector. Bone marrow mesenchymal stem cells were obtained from rats using the method of density gradient centrifugation combined with adherent culture. Recombinant plasmid pcDNA3.1(+)/ChM-Ⅰ was transfected into rat bone marrow mesenchymal stem cells with liposome method, and G418 selection was used for stable screen of transfected cells. Reverse transcription-PCR and western blot were used to detect chondromodulin-Ⅰ expression in celllines.
RESULTS AND CONCLUSION:The positive clones were digested by enzyme and were identified and sequenced. The results showed that the reality length and sequence of chondromodulin-Ⅰ gene were consistent with the theoretical values, and reading frame was correct. Reverse transcription-PCR and western blot results showed that the expressions of chondromodulin-ⅠmRNA and protein were markedly up-regulated in bone marrow mesenchymal stem cells. Recombinant plasmid pcDNA3.1(+)/ChM-I was successful y constructed, and transfected into rat bone marrow mesenchymal stem cells. After G418 selection, expression of chondromodulin-Ⅰ was up-regulated stably in rat bone marrow mesenchymal stem cells.

OBJECTIVE: To explore an effective method of correction of deviated nose and functional reconstructive nasal surgery. METHOD: Among 102 patients 32 cases were treated by septoplasty only, 53 cases were corrected by bony pyramid, 3 cases with severe asymmetry of bony pyramid by wedge resection and 14 cases by the implant of the septal or rip cartilage. RESULT: The successful rate was 92.20% (92/102) with period of 6 to 24 months follow up. CONCLUSION Correcting the deviated nose to reconstruct its function with the intranasal approach and multiple techniques, can benefit both the cosmetology and nasal functional improvement. Rectifying the nasal septum, debonding the tissue of the deviated section completely, and fixing reconstructive structures are the keys for the successful result.
Adolescent ; Adult ; Female ; Humans ; Male ; Middle Aged ; Nasal Septum ; abnormalities ; Nose Deformities, Acquired ; surgery ; Rhinoplasty ; methods ; Treatment Outcome ; Young Adult

Objective To explore the abnormal karyotype characteristics of myelodysplastic syndrome (MDS)patients and their correlation with clinical prognosis.Methods Analyzed the karyotypes of 281 MDS patients by use of G-banding tech-nique.Results Through analysis of the karyotypes of 281 MDS patients,found that the percentage of abnormal karyotypes was 48.75% (137/281),among 137 patients with abnormal karyotypes,43.07% (59 cases)presented with numerical aber-ration,31.39% (43 cases)with structural aberration,and 25.54% (35 cases)with both numerical and structural abnormali-ties.As for MDS subtypes,the occurrence rate of abnormal karyotype was 63.41% (26/41)in RAEB-2,58.73% (37/63)in RAEB-1,39.2% (49/125)in RCMD,15.38% (2/13)in RAS and 22.58% (7/31)in RA.The rates of abnormal karyotype in RAEB-1 and RAEB-2 were significantly higher than that in RA and RAS(P<0.01),and in RCMD (P <0.05).The fre-quent abnormal karyotypes were as follows:+8,-7/7q-,-20/20q-,complex karyotypes chromosomal translocation,i(17),-Y and +21.The follow-up study of 159 MDS patients indicated that the median survival time was 39 months for 68 patients with normal karyotypes and 21 months for 91 patients with abnormal karyotypes,the former was significantly prolonged than the latter (P < 0.05).As far as the leukemia transition rate was concerned,the patients with aberrant karyotypes (35.5%)were significantly higher than that with normal karyotypes (10.3%)(P < 0.01),among them,the cases with complex karyotypes and-7/7q-more easily transit into leukemia.Conclusion MDS was one kind of clonal hematological ma-lignancy with high heterogeneity.Chromosomal karyotype test plays an important role in the correct diagnosis,typing and prognosis evaluation of MDS.

OBJECTIVE: To study the anatomical character of the ethmoid sinus with spiral CT, and provide correlated data for diagnosis and surgery operation. METHOD: One hundred patients whose vertebra artery was injected with Angiografin underwent axial consecutive computed tomography and these data were studied with multiplanar reformation. RESULT: Based on the relation of posterior ethmoid sinus to sphenoid sinus, the posterior ethmoid sinus was divided into antero sphenoid types and super sphenoid types. According to the relation between the posterior ethmoid and the optic canal, the posterior ethmoid sinus was divided into antero canal, seminal abut types, canal abut types. According to the degree of the bulging of the optic canal, the posterior ethmoid sinus was divided into notch types, seminal cover types, canal cover types. Bulging of the optic canal formed on the lateral wall of the posterior ethmoid sinus was 40 sides (20%). CONCLUSION MPR in spiral CT is powerful tool for the anatomical study of the ethmoid sinus, it could provide accuracy evaluation and analyzation, these results are helpful in directing the diagnose and therapy.
Adult ; Aged ; Asian Continental Ancestry Group ; Ethmoid Sinus ; diagnostic imaging ; Female ; Humans ; Male ; Middle Aged ; Sphenoid Sinus ; diagnostic imaging ; Tomography, Spiral Computed