Objective To assess the value of MSCT and postprocessing techniques in displaying abnormal blood vessels of pulmonary sequestration. Methods Ten patients with pulmonary sequestration proved with operation and pathology underwent both plain and enhanced chest CT scan. The reconstructed images of maximum intensity projection, multiplanar reconstruction and volume rendering were analyzed retrospectively. Results Of 10 patients, intra-lobe type sequestration was seen in 9 patients and extra-lobar type in 1 patient. The lesions located in the left lower lobe in 8 patients and in the right lower lobe in 2 patients. Angiography postprocessing technique displayed abnormal supplying vessels in 9 patients (7 from descending aorta and 2 from abdominal aorta) and displayed the origin, courser, branches and distribution of lesions clearly. Vessels in 9 patients drained into inferior pulmonary veins except in one drained into azygos vein. Conclusion MSCT angiography with postprocessing reconstruction techniques can display abnormalities of pulmonary sequestration clearly and has great value in the diagnosis of pulmonary sequestration, so as might be the first choice in diagnosing pulmonary sequestration.

Objective To evaluae possible association between interleukin-1 beta (IL-1?) gene exon 5 polymorphism and childhood asthma.Methods The study was conducted in two different groups: asthmatic children(n=55) and healthy children(n=35). The IL-1? gene exon 5 polymorphism was genotyped by polymerase chain reaction-restriction fragment length polymorphism analysis (PCR-RFLP). Results Frequencies of CC,CT and TT genotypes were 92.7%,7.3%,0, and frequencies of C,T allele were 96.4%,3.6% in asthmatic group. However, frequencies of CC,CA and AA genotypes were 85.7%,14.3%,0, and frequencies of C,T allele were 92.9% ,7.1% in healthy group. There were no significant difference in distribution of genotypes and allele frequencies between two groups.Conclusion IL-1? gene exon 5 polymorphism may not be associated with childhood asthma.

According to relevant national laws and regulations, practitioner training was included into laboratory animal science teaching reform.By adjusting the training content and teaching method and use of animal models of typical human diseases, the transformation of training mode was realized and improved.By the assessment of basic theory in combination with practical operation, the thinking ability and hands-on skill of the practitioners are much improved. Through classroom instruction, experimental teaching, quality assessment and tracking survey, the evaluating process of the training quality of training teaching is performed.Therefore, the teaching reform of the laboratory animal science based on the training of practitioners is established.

Objective To establish a patient-derived gastric cancer xenograft( PDX) model in nude mice and to in-vestigate the application of near infrared fluorescent ( NIRF) dye IR-783 in in vivo imaging of gastric cancer xenograft mod-els.Methods Fresh human gastric cancer tissue was taken and transplanted into the subrenal capsule of nude mice to es-tablish the xenograft model.When the transplanted tumors grew,took part of the tumor tissue to do HE staining and compare the structural characteristics with the primary tumor.Another portion of the tumor was xenografted into nude mice subcutane-ously.Twenty days later,the tumor-bearing mice were injected intraperitoneally with IR-783 dye (10μM) in a dose of 100 mg/20 g.The intensity of the tumor image was monitored by optical NIRF imaging.The correction between tumor volume and fluorescence intensity was analyzed.Finally,the expression of OATP1B3 and HIF1αin the xenografted tumor tissue was detected by immunohistochemistry.Results We successfully established three patient-derived xenograft ( PDH) models of human gastric cancer.The transplanted tumor tissues maintained the histological characteristics of the primary tumor well.NIRF signal can be detec ted in subrenal capsule of the xenografted nude mice.The correlation between tumor size and fluorescence intensity in the PDX models reached higher than 98%.Strong positive expressions of HIF1αand OATP1B3 in the tumor tissues were detected.Conclusions NIRF dye IR-783 can be specifically accumulated at the tumor site,therefore, can be used to detect PDX in vivo early.The tumor targeting property may be related to the expression of OATP1B3 and HIF1α.

Objective To evaluate the effect of near infrared heptamethine cyanine dye IR-783-mediated specific tumor imaging in spontaneous tumor of dogs .Methods IR-783 was intraperitoneally injected to nude mice models of transplanted tumor in a dose of 5μmol/kg.The metabolic time course of IR-783 was detected by in vivo imager .Based on the results of above observation , IR-783 was injected to dogs with spontaneous tumor in a dose of 1.5μmol/kg.The site of intravenous injection was the hind leg .Tumor and peri-tumoral tissues were removed at 5 days after IR-783-injection for fluorescence imaging , pathology and frozen section fluorescence examinations .Results After i.p.IR-783 injection to nude mice models of transplanted tumor , the transplanted tumor tissues of nude mice had stronger specific fluorescence than normal tissues by imaging at 8 days after injection .After i.v.IR-783 injection to four dogs with spontaneous tumor , the fluorescence signal in the tumor tissues was stronger than that in the normal tissues at 5 days after injection .Conclusions Near infrared fluorescent dye IR-783 could be specifically taken up by tumor tissues , and can be used for specific diagnosis of tumor.It has an important clinical application prospect .

OBJECTIVETo study the relationship between cartilage end-plate calcification (CEC) and cervical intervertebral discs regression (CIDR) in rabbits, and to study the inhibitory effect of combined therapy of Kanggu Zengsheng Capsule (KZC) ansforming growth factor-apsule (TGF-PLC) and igene therapy (GT) on CEC by measuring the thickness of CEC layer.

METHODSThirty-five New Zeland rabbits of 4 months old were selected to establish cervical dynamic imbalance rabbit model for inducing CIDR (No disposal was given to rabbits in the normal control group). Seven months after operation, combined therapy of KZC and PLC were given, in doses calculated by body weight, to the modeled rabbits in the drug treated group with CEC of either superficial layer or full layer, twice a dantly by gavage for 30 successive days. While to those in the gene therapy group, the recombinant plasmid DNA with transforming growth factor-beta1 (TGF-beta1) was injected once their intervertebral discs (ID) of C(2-3) C(3-4) and C(4-5), 20 microl for each injection. One month later, all rabbits were sacrificed with periotic venous gas embolic method and their ID of C(4-5) (including partial body of the upper and lower vertebrae) was resected. The degree of CIDR was evaluated morphologically, and the thickness of CEC in rabbits was measured and compared between groups.

RESULTSThickness of CEC in the model group, either of superficial layer or of full layer, was significantly more than that in the normal control group with significant difference. Both combined KZC and PLC therapy and gene therapy showed significant inhibitory effects on CEC in treating CIDR (P < 0.05).

CONCLUSIONCEC is the initial factor of CIDR with highly positive correlation. Both combined therapy of KZC and PLC and gene therapy can significantly inhibit CEC.

Animals ; Calcinosis ; complications ; pathology ; Cartilage ; pathology ; Cervical Vertebrae ; pathology ; Combined Modality Therapy ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Genetic Therapy ; Intervertebral Disc ; pathology ; Male ; Phytotherapy ; Rabbits ; Random Allocation ; Spinal Diseases ; complications ; pathology ; therapy

Objective To develop and evaluate three types of biodegradable intravascular stent (BIS)with biodegradable materials of poly-L-acid(PLLA)or Poly](1-lactide-co-glycol ide)(PLLGA). Methods Forty-five spiral BISs(15 BISs for each type)were prepared with PLLA(153 kDa,type A), PLLGA(141 kDa,type B),and PLLGA(contains paclitaxel,141 kDa,type C).The physical and mechanical properties of the BIS were tested,including radial force,overlay rate,longitudinal shrinkage rate,and rate of expansion.Results The radial force of three types BIS was 15.7%/0.006 Mpa(type A), 16.3%/0.006 Mpa(type B),and 16.4%/0.006 Mpa(type C).The radial force of type A was greater than that of type B and C(P

Objective To elucidate functional alterations of glomerular mesangial cell (GMC) contraction and its relationship with diabetic glomerular hyperfiltration. Methods Male Wistar rats were divided into groups of normal control and 2 weeks diabetes induced by STZ. GMC were cultured in the presence of normal glucose (5mM). Meanwhile in comparison GMC obstained from normal rats were cultured in the presence of 30 mM glucose for 48 h in vitro. By using laser scanning confocal microscopy (LSCM) , we measured basal calcium concentration, the changes of calcium level in response to vasoconstrictor agonist angiotensin H (Ang I ),and the effect of protein kinase C (PKC) inhibitor PMAC10 M,24 h)on cytosol calcium of GMCs. Results The creatinine clearance rate (Ccr) was increased with age in diabetic rats, reaching a peak at 2 weeks (P

CD127 is the interleukin7 receptor ?(IL7R?),it regulates the specific respond of T lymphocytes to IL7.CD127 plays an indispensable role in the development of thymocytes into T lymphocytes,the survival and homeostatic proliferation of memory T cells.There are only two phases of the life period of T cells that do not express CD127:immature CD4+8+double positive(DP)thymocytes and activated T cells.Recently,it was found that CD127 play an important role as the specific marker of memory T cells and regulator T cells.The role and mechanism of CD127 in the life period of T cells were discussed herein.

Objective To study the changes of phosphatidylcholine-specific phospholipase D (PC-PLD) enzyme activity of glomerular mesangial cells (GMCs) in high glucose and the effect of PLD on cytoskeleton. Methods Rats GMCs were cultured in high glucose(30 mmol/L) for 48 hours. PLD enzyme activity was measured by enzyme coupled colorimetry. PKC activity was measured by substrate phosphorylation, and fluorescence intensity of F-actin was observed by FITC-labeled antibody and laser scan cofocal microscopy (LSCM) . Results In high glucose, PLD and PKC activities were obviously elevated, but fluorescence intensity of F-actin was decreased and its cytoskeletal pattern was disassembly. After treatment with inhibtor of PLD, PKC activity was significantly decreased, and intensity and organization of F-actin were recovered. Conclusion Elevation of PLD activity induced by high glucose may influence the cytoskeleton and contraction of CMC through PKC pathway.