Objective To investigate the gene therapy of hypoparathyroidism (HPT) with hemopoietic stem cell s(HSCs) integrated with parathyroid hormone (PTH) gene.Methods Human PTH gene was amplified by polymerase chain reaction from pcDNA 3.1 -PTH templates and inserted into murine stem cell virus (MSCV) vectors. The plasmids recombinated with PTH gene were transfected into PA317 packaging cells and screened for positive clones with Geneticin. The condensed recombinant retroviruses were obtained and used to infect HSCs coming from umbilical cord blood. The infected HSCs were injected into the mice suffering from HPT. The change of symptoms and serum level of PTH and calcium in each group of mice was observed.Results Human PTH gene was proved to be inserted into MSCV vectors and the titres were up to 2?10 7 colony forming unit (CFU)/ml in condensed retroviral solution. The secretion of PTH reached 15 ng per 10 6 cells per 48 h. The wild type viruses were not detected by PCR amplification. The mice suffering from HPT recovered quickly and the serum level of calcium and PTH remained normal for about 3 months after the HSCs recombinated with PTH gene were injected into them. In the groups of mice subject to the injection of the recombinant retroviruses containing PTH gene, the serum level of PTH and Calcium was significantly increased in a short time, and then declined slowly. And the mice took on the manifestation of hypoparathyroidism again. The mice only subject to the implantation of HSCs were all dead within 20 days.Conclusion A long term therapeutic effect could be obtained by infusing the HSCs which were integrated with PTH gene into the mice suffered from hypoparathyroidism.

Bone marrow mesenchymal stem cells (BMSCs) are a kind of pluripotent stem cells derived from bone marrows, which can not only support hematopoiesis, but also have capabilities of multidifferentiation, high-proliferation and self-renewing. They have become one of hotspots in stem cell studies. Studies on in vitro intervention with BMSCs with TCMs have made remarkable progress in recent years. According to the findings, some traditional Chinese medicines can promote proliferation of BMSCs, some can inhibit the apoptosis of BMSCs, while others can induce BMSCs to differentiate into multiple cell types, such as osteoblast. Furthermore, some studies also involved relevant action mechanisms. The authors summarized the advance in relevant studies by reference to relevant literatures of this field.
Animals ; Apoptosis ; drug effects ; Bone Marrow Cells ; cytology ; Cell Differentiation ; drug effects ; Cell Proliferation ; drug effects ; Humans ; Medicine, Chinese Traditional ; methods ; Mesenchymal Stromal Cells ; cytology ; drug effects

Accidents, Occupational ; Bromine ; poisoning ; Humans ; Hydrobromic Acid ; poisoning

Objective To validate the Partin table 1997,2001 and 2007 for their accuracy in predicting pathologic stage in Chinese prostate cancer patients.Methods From January 1997 to June 2007,109 consecutive patients with clinically localized prostate carcinoma underwent open retropubic or laparoscopic radical prostatectomies and met all inclusion criteria well enrolled.Receiver operating characteristic(ROC)analysis was performed tO test the predictive accuracy of organ confined disease (0CD),extraprostatic extension(EPE),seminal vesicle involvement(SVI)and lymph node involvement(LNI). Results OCD,EPE,SVl and LNl were noted in 70%,17%,13%and 0%of cases respectively.The area under curve(AUC)of ROC for Partin table 1997 was 0.727,0.654 and 0.811for 0CD.EPE and SVl respectively,and was 0.693,0.633 and 0.835 for Partin table 2001 and 0.669.0.611 and 0.778 for Partin table 2007.Conclusions Partin tables 1997,2001 and 2007 are able to accurately predict the pathologic feature of seminal vesicle involvement.However,only Partin table 1997 can more accurately predict organ confined disease in this external validation for Chinese patients.

PurposeTo evaluate the existence and extent of magnetic resonance(MR) artifacts caused by frequently used metallic dental materials and to compare the influence of different MRI sequences on artifacts.MethodsA total of 22 kinds and 25 metallic dental samples were tested with 1.5 T MR imager and gradient-echo sequence. Spin-echo and fast spin-echo were added to parts of these samples. Results Of all the 25 metallic dental samples, 11 including gold, amalgam, and silver point did not produce artifact. Titanium alloy and porcelain product fused in metal had mild artifacts. Whereas the remaining 12 samples such as the retention pin and pivot pin showed severe artifacts. Artifacts produced by retention pin, nickel chromium crown and so on were less severe on fast spin-echo. ConclusionsAttention should be paid to some of the metallic dental materials, which could cause severe MR artifacts and image degradation, when undergoing face,jaw and head MR examination. Artifacts can be alleviated by using proper metallic materials or choosing proper imaging sequence and parameters.

Objective To investigate 4 variants single nucleotide polymorphisms (SNPs) of 5-lipoxygenase-activating protein(ALOX5AP) in lipoxygenase pathway and in cytochrome P450 pathway as susceptibility genes for stroke in a southeastern Chinese population,and evaluate the associations between susceptibility genes and cerebral infarction,to find whether gene-gene interactions increase the risk of cerebral infarction.Methods By case-control study,two hundred and ninety-two patients with cerebral infarction and 259 healthy control subjects were included.Eight variants in 5 candidate genes were examined for stroke risk,including the SG13S32 (rs9551963),SG13S42 (rs4769060),SG13S89 (rs4769874),and SG13Sl14 (rs10507391) variants of the ALOX5AP gene,the G860A (rs751141) variant of the soluble epoxide hydrolase (EPHX2) gene,the A1075C (rs1057910) variant of the CYP2C9 *2 gene,the C430T (rs1799853) variant of the CYP2C9* 3 gene,and the A6986G (rs776746) variant of the CYP3A5 gene.Gene-gene interactions were explored using generalized multifactor dimensionality reduction (GMDR)methods.Results There were no statistically significant differences in the frequencies of the genotypes of the 8 candidate genes.The GMDR analysis showed a significant gene-gene interaction between SG13S114 and A6986G,with scores of 10 for cross-validation consistency and 9 for the sign test (P =0.011).These genegene interactions predicted a significantly higher risk of cerebral infarction (adjusted for age,hypertension,and diabetes mellitus;OR =1.804,95％ CI 1.180-2.759,P =0.006).Conclusions A two-loci gene interaction confers significantly higher risk for cerebral infarction.The combinational analysis used in this study may be helpful in the elucidation of genetic risk factors for common and complex diseases.

Adenovirus vector tumor vaccine is one of the current hotspots of medical research,with wide application foreground.The article discusses the clinical application and research of recombinant adenovirus vector tumor vaccine and illuminates its security and ethical issues.

Objective:To evaluate the feasibility of integrating 3D photos and cone-beam computed tomography (CBCT)images and to assess the degree of error that may occur during the above process,and to analyze soft and hard tissue changes after orthognathic surgery using this new method.Methods:Ten patients with maxillofacial deformities were chosen.For each patient,CBCT scans and stereophotographic images were taken before and 3 months after surgery.3D photos were superimposed onto the CBCT skin im-ages using relatively immobile areas of the face as a reference.3D color maps and mean distances were used to evaluate the errors that might occur during the process.Two reference planes were set up using cer-tain points.The distances between Prn (pronasale),Sn (subnasale),Ls (labrale superior),ANS (anterior nasal spine),A (subspinale),UIE (upper incisor edge)to the coronal plane were calculated before and af-ter surgery.In order to verify the repeatability of this method,we examined the distances twice at two-week intervals.Paired t test was used to evaluate the reproducibility.Results:CBCT and 3D photos could be successfully fused with clinically acceptable errors.This new method could be used to evaluate soft and hard tissue changes after orthognathic surgery.The 3D color maps showed that the two images could be fused with minimal errors.The mean distances were within 0.3 mm,and the locations of landmarks on maxilla and mandible such as Ls,ANS,A,UIE changed significantly after orthognathic surgery (P <0.05). Landmarks on the nose such as Prn,Sn had little changes after surgery (P >0.1 ).The paired t test showed that the mean value and standard deviation were (0.08 ±0.98)mm.Conclusion:Fusing of CBCT and 3D stereophotographic images used as a new method in evaluating soft and hard tissue changes after orthognathic surgery was feasible and accurate.The virtual 3D composite craniofacial models permitted concurrent assess-ment of hard and soft tissues during diagnosis and treatment planning.Maxillary and mandibular locations had significant association with orthoganthic surgery while the nasal tissue was not simp affected by surgery.

BACKGROUND:Endothelial progenitor cells are recruited into local vascular injury under the injury-induced stimulation, and then differentiate into mature endothelial cells that are thereby involved in angiogenesis and endothelial repair. OBJECTIVE:To investigate whether endothelial progenitor cells can al eviate renal injury and improve renal function of ischemia/reperfusion injury (I/R) rats. METHODS:Peripheral blood samples extracted from Sprague-Dawley rats were used to isolate and culture endothelial progenitor cells using density gradient centrifugation. Twenty-two male Sprague-Dawley rats were randomized to three groups:I/R group, normal control group, and endothelial progenitor cells group. In the I/R and endothelial progenitor cells groups, the right kidney was removed and the renal artery and vein of the left kidney were occluded for 40 minutes to establish I/R models in the rats, and then endothelial progenitor cells (5×109/L, total y 1 mL) or solvent was transplanted via the artery of the left kidney into the left kidney. In the normal control group, the experimental procedure was same as that in the I/R group except for occlusion of the artery and vein of the left kidney. Renal and blood samples from three groups were col ected at day 1 after operation. Peripheral blood CD34 and vascular endoethelial growth factor receptor 2 expressions were determined using flow cytometry and immunofluorescence methods, serum creatinine and urea nitrogen were tested, and immunohistochemistry observation was used for CD34 observation. RESULTS AND CONCLUSION:Compared with the normal control group, serum creatinine and urea nitrogen levels were significantly increased, and tubulointerstitial CD34 expression was decreased in the I/R group (P<0.05). Endothelial progenitor cells treatment largely decreased the levels of serum creatinine and urea nitrogen, and increased CD34 expression (P<0.05). These findings indicate that transplantation of endothelial progenitor cells contributes to renal protection in I/R rats.

Objective To assess the usefulness of spiral CT examination in detecting the local recurrence and the metastatic lymph nodes of chest in the patients with post-pulmonectomy for central lung cancer.Methods The data of 110 contrast spiral CT of chest in 55 patientswith central bronchial carcinoma post-operation were retrospectively analysed.Results 12 person-time in 9 cases recurred in thebronchial stump or anastomose.The short diameter of lymph nodes in the thorax ≥1 cm was showed in 33 person-time of 26 cases,of them,14 cases was considered as metastasis in combination with the clinical data.Conclusion Spiral CT is the one of the best examination indetecting the post-operation recurrence in the patients with central bronchial carcinoma,but it is still of limitation in evaluating the nature of lymph nodes.