OBJECTIVE: To establish an animal model of bilateral alveolar cleft and to determine the effect of cleft on maxillary growth. METHODS: Eight dogs (12 weeks old) were divided into unoperated control groups (n = 4) and the model group (n = 4). The model dogs were operated to establish a bilateral alveolar cleft. All the dogs were killed and the craniofacial morphology on clean skull was analyzed by the direct detection and CT. RESULTS: The length, the foreside width, and the foreside height of the maxillary in the model group were shrunken compared with those of the control group (P < 0.05). CONCLUSION The alveolar cleft plays an important role in the maxillary aberration.
Alveolar Process ; abnormalities ; Animals ; Cleft Palate ; Disease Models, Animal ; Dogs ; Female ; Male ; Maxilla ; abnormalities ; growth & development ; Random Allocation

OBJECTIVETo investigate restoration of alveolar cleft with engineered bone constructed by sponge collagen protein combined bone mesenchymal stem cells (BMSC).

METHODSTwelve dogs were divided into 4 groups, the third incisor and alveolar bone with periosteum in bilateral maxilla were removed to form alveolar cleft model. The BMSCs were isolated from dog bone marrow. After being cultured and induced, the BMSCs were seeded in sponge collagen protein and cultured for 48 hours. The composites of BMSCs and collagen were implanted into the defect of alveolar cleft. After 12 weeks' feeding, those dogs were sacrificed. Three-dimensional CT and histological examination were used to observe the progress of bone formation.

RESULTSThe defects healed at 12 weeks after being implant BMSCs-collagen composites, the width of engineered bone is resembled with positive control, but the height is less than positive control.

CONCLUSIONSThe engineered bone can restore the defect of alveolar bone effectively, it can be used clinically to treat alveolar cleft.

Alveolar Process ; abnormalities ; Alveoloplasty ; methods ; Animals ; Bone Marrow Cells ; cytology ; Bone Regeneration ; Cell Culture Techniques ; Cleft Palate ; surgery ; Collagen ; Dogs ; Female ; Male ; Mesenchymal Stromal Cells ; cytology ; Tissue Engineering ; methods

Cancrum oris is a kind of gangrenous disease happening on the maxillofacial region. It is characterized by developing rapidly, high lethality and deforming rate. This article reported a case of maxillofacial deformity caused by cancrum oris, and discussed based on relevant literatures.
Humans ; Maxilla ; pathology ; Noma

OBJECTIVETo identify the self-preparation monoclonal antibody which target to clenbuterol, and set up the standard curve to clenbuterol (CL) detection.

METHODSThe affinity constants and activity of the monoclonal antibody which target to CL were determined by ELISA. ELISA was also used to confirm whether the monoclonal antibody had any across-reaction with BSA and CL analogues. The rat ascites which contains the monoclonal antibody target to CL was purified by (NH4)2SO4 salt-out method and further by affinity column. At last, the CL detection standard curve which based on indirect competition ELISA was established.

RESULTSThe ELISA experiment showed that the antibody titer was 10(6) and the monoclonal antibody affinity constants was 2.90 x 10(10) L/mol. The result of the indirect competition ELISA confirmed that the monoclonal antibody had no cross-reaction with BSA and a few kind of CL analogue. CL detection standard curve based on indirect competition ELISA was established, which R2 was 0.9812, and the lowest detectable limit was 1.0 ng/ml.

CONCLUSIONThe standard curve based on indirectly competitioning ELISA was established. The self-preparation monoclonal antibody which target to CL has high affinity and high specific to CL, which had established the foundation to the advanced development of the CL immune test paper and CL ELISA kit.

Animals ; Antibodies, Monoclonal ; chemistry ; isolation & purification ; Antibody Affinity ; Clenbuterol ; immunology ; Cross Reactions ; Enzyme-Linked Immunosorbent Assay ; Limit of Detection ; Rats

OBJECTIVETo explore the associated biomarkers influencing recurrence, metastasis and prognosis in patients with gastrointestinal stromal tumors (GIST) after complete resection.

METHODSTumor tissue samples of 148 patients with GIST undergoing complete resection from January 1990 to December 2008 in Sun Yat-sen University Cancer Center were collected. The expressions of Ki-67, E-cadherin, MMP7, CD44, nm23, P53, survivin, Cyclin D1, COX-2, and VEGF in tumor tissue samples were detected by tissue microarray and immunohistochemistry (IHC). The association of above factors expressions with recurrence, metastasis and prognosis was examined.

RESULTSLog-rank test showed that Ki-67, E-cadherin, MMP7, CD44, P53 and survivin were associated to disease-free duration after complete GIST resection (all P<0.05), and the Ki-67, E-cadherin, P53 and survivin were associated to overall survival (all P<0.05). Cox multivariate analysis revealed that disease-free survival was associated with Ki-67, CD44 and P53 (all P<0.05), and the overall survival was only associated with Ki-67 (P<0.05).

CONCLUSIONKi-67, CD44 and P53 are closely associated with recurrence and metastasis after complete GIST resection, and Ki-67 can predict the prognosis of GIST.

Adult ; Aged ; Aged, 80 and over ; Biomarkers, Tumor ; metabolism ; Female ; Gastrointestinal Neoplasms ; metabolism ; surgery ; Gastrointestinal Stromal Tumors ; metabolism ; surgery ; Humans ; Hyaluronan Receptors ; metabolism ; Ki-67 Antigen ; metabolism ; Male ; Middle Aged ; Neoplasm Metastasis ; Neoplasm Recurrence, Local ; Prognosis ; Tumor Suppressor Protein p53 ; metabolism

OBJECTIVETo investigate the indications, safety and difficulties of one stage thyroidectomy and bilateral neck lymph node dissection for well-differentiated thyroid carcinoma.

METHODSA retrospective review was carried out in 36 well-differentiated thyroid carcinoma patients so treated from 1990 to 2004. Various incisions including H, L and modified Kocher types were selected according to the location of primary tumor and status of cervical lymph node metastasis. Either total thyroidectomy or sub-total thyroidectomy combined with bilateral neck lymph node dissection according to the principles of modified radical neck lymph node dissection: preserving the internal jugular vein, spinal accessory nerve and sternocleidomastoid muscles.

RESULTSThere was no operative death in this group. Postoperative complications included: 2 wound bleeding, 3 recurrent laryngeal nerve resection due to tumor involvement, 1 recurrent laryngeal nerve injury, 2 unilateral internal branch of superior laryngeal nerve injury, 9 unilateral external branch of superior laryngeal nerve injury, 3 unilateral accessory nerve injury, 5 unilateral sympathetic nerve injury, 2 unilateral phrenic nerve injury, 6 chylus fistula, 13 temporary hypoparathyroidism, 2 permanent hypoparathyroidism. The dissected lymph nodes were found to be positive from 0 to 21 in each patient with a mean of 8.3. Of the 36 patients: 31 had bilateral positive lymph nodes; 3 unilateral positive; 2 bilateral negative lymph nodes. The follow up period ranged from 1 to 13 years, Three patients died of distant metastasis, 1 died of cerebral vascular accident. 7 patients lost in follow-up. Totally, 25 patients are still alive, 3 patients had local relapse and were surgically treated again.

CONCLUSIONThe procedure of one-stage thyroidectomy and bilateral neck lymph node dissection for well-differentiated thyroid carcinoma is safe, as it is mandatory that at least one unilateral internal jugular vein should be preserved; one unilateral recurrent laryngeal nerves and accessory nerves should not be injured. Well-differentiated thyroid carcinoma patients whose bilateral cervical lymph nodes are clinically suspected to be positive (obviously enlarged, hard, purplish grapelike lymph node) or are confirmed pathologically to be positive are indications for one-stage thyroidectomy and bilateral neck lymph node dissection. Total or sub-total thyroidectomy should be undertaken with emphasis that at least one parathyroid with blood supply should be preserved. It is of utmost importance that not only the cancer be completely resected but the function of the organs be preserved.

Adenocarcinoma, Follicular ; secondary ; surgery ; Adult ; Carcinoma, Papillary ; secondary ; surgery ; Female ; Follow-Up Studies ; Humans ; Hypothyroidism ; etiology ; Lymph Nodes ; pathology ; Lymphatic Metastasis ; Male ; Middle Aged ; Neck Dissection ; Neoplasm Recurrence, Local ; Postoperative Complications ; Retrospective Studies ; Survival Rate ; Thyroid Neoplasms ; pathology ; surgery ; Thyroidectomy ; methods

OBJECTIVETo explore the effect of prostatectomy on nocturia in patients with benign prostatic hyperplasia (BPH).

METHODSThe data of patients who had received prostatectomy for BPH between June 2006 and December 2007 were collected. Nocturia severity was assessed preoperatively and 3 to 6 months after prostatectomy by the number of nocturia events, the time from falling sleep to the first awakening to void (hours of undisturbed sleep, HUS), the score of the nocturia quality of life (N-QOL) questionnaire, the International Prostatic Symptom Score (IPSS) and the quality of life (QOL) score.

RESULTSOne hundred and twenty five cases were included. Of them, 73 patients finished the follow-up completely. There were 62 patients whose number of nocturia events before the operation was equal or more than 2. The data from these 62 patients were analyzed. Of them, 56 patients underwent transurethral resection of prostate, the remaining 11 patients suprapubic prostatectomy. Significant improvement (P < 0.01) was noted in all the following parameters after treatment: the number of nocturia events decreased from 4.2 ± 2.4 to 2.2 ± 1.0, HUS increased from (1.8 ± 0.7) h to (3.0 ± 1.4) h, N-QOL score raised from 30 ± 10 to 40 ± 7, IPSS decreased from 23 ± 5 to 8 ± 5, and QOL score fell down from 4.4 ± 0.7 to 1.5 ± 1.0.

CONCLUSIONThe prostatectomy can markedly improve the symptoms of nocturia, sleep and life quality in the BPH patients who accompanied with nocturia.

Aged ; Aged, 80 and over ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Nocturia ; complications ; surgery ; Prostatectomy ; Prostatic Hyperplasia ; complications ; surgery ; Quality of Life ; Retrospective Studies ; Treatment Outcome

OBJECTIVETo study the center effect discrepancy in the multi-center clinical trials.

METHODSTwo groups of data collected from the multi-center clinical trials were used. Data were processed by covariance analysis and Meta-analysis.

RESULTSIn the covariance analysis, the discrepancy of the center effect values indicated statistical significance. Through Meta-analysis on fixed effect model, the discrepancy in one heterogeneity test showed no statistical significance (P > 0.05) while the inter-group discrepancy of the merged effect values drawn from analysis based on fixed effect model having statistical significance (P < 0.05). In the random effect model, the discrepancy in one heterogeneity test showed statistical significance (P < 0.05) while the inter-group discrepancy of the merged effect values drawn from analysis based on random effect model having no statistical significance (P > 0.05).

CONCLUSIONSStudies on multi-center random controlled clinical trials, when statistical significance was found in the interaction discrepancy between the inter-center and the center-group relation, the merged effect values should be compared and analyzed by an appropriate statistic model based on the heterogeneous test results from the Meta-analysis. However, if the result from covariance analysis and the one from Meta-analysis did not agree to each other, the results drawn from the Meta-analysis were reliable.

Data Collection ; Humans ; Multicenter Studies as Topic ; methods ; Randomized Controlled Trials as Topic ; methods

OBJECTIVETo investigate the feasibility of inducing differentiation of the human amniotic mesenchymal cells (hAMCs) into osteoblasts in vitro, so as to provide the seed cells for bone tissue engineering.

METHODSThe hAMCs were isolated from abandoned human amnion and cultured in osteogenic media to induce the osteogenic differentiation in vitro. After hAMCs were induced by osteogenic media for 15 days, morphological observation, immunocytochemistry and western blot were used to study the cellular morphology and expression of alkaline phosphatase (ALP), type I collagen, osteopontin and osteocalcin.

RESULTSThe primary cultured hAMCs had long spindle shape or irregular shape, which were distributed evenly. The cells were usually suheultured in 5 or 7 days. After subculture, the cells became larger. After cultured by osteogenic media for 15 days, the hAMCs were detected to express ALP, osteocalcin and osteopontin, and secrete type I collagen.

CONCLUSIONSThe hAMCs are isolated, cultured and amplified easily in vitro. The induced differentiated cells by osteogenic media have typical osteoblast morphological and functional characteristics, which can be used as seed cells for bone tissue engineering.

Amnion ; cytology ; Cell Differentiation ; Cells, Cultured ; Humans ; Mesenchymal Stromal Cells ; cytology ; Osteoblasts ; cytology ; Osteogenesis ; Tissue Engineering ; methods

AIMTo obtain Clenbuterol monoclonal antibodies.

METHODSClenbuterol complete antigen was prepared with diazotization method. BALB/c mice was immunized with subtractive immunization, Clenbuterol monoclonal antibody was prepared with rule hybridoma technique.

RESULTSThe mice obtained tolerance to BSA by subtractive immunization. The rate of the hybridoma cell with positive reaction which had obtained was 8.2%, and the specific clenbuterol monoclonal antibody was obtained at last.

CONCLUSIONMonoclonal antibodies to micromolecule contaminant be prepared by subtractive immunization, could decrease the workload in the bolting of monoclonal antibodies, and increase the chance to obtain the antibody of expected.

Animals ; Antibodies, Monoclonal ; biosynthesis ; immunology ; Clenbuterol ; immunology ; Female ; Hybridomas ; metabolism ; Immunization ; methods ; Male ; Mice ; Mice, Inbred BALB C ; Serum Albumin, Bovine ; immunology