OBJECTIVETo explore the effects of high dose glycosides of Tripterygium wilfordii Hook. f (GTW) on the fertility of young rats.

METHODSFifty female SD young rats and 50 male SD young rats were randomly divided into the blank group and the GTW group, 25 in each. GTW was given at the daily dose of 9 mg/kg. After 12 weeks of medication, the male rats were caged together with healthy adult female rats in the ratio of 1:1. The female rats were caged together with healthy adult male rats in the ratio of 2:1. The cage process lasted for two weeks, totally for three times. The pregnant rate of female rats and the survival rate of baby rats were then observed.

RESULTSThere was no significant difference in the pregnant rate or the survival rate of baby rats in the GTW group.

CONCLUSIONHigh dose GTW showed no obvious effects on the fertility of adult rats or the growth and development of new born rats.

Animals ; Female ; Fertility ; drug effects ; Glycosides ; administration & dosage ; pharmacology ; Male ; Pregnancy ; Rats ; Rats, Sprague-Dawley ; Tripterygium

Objective To investigate homografting vascular endothelial progenitor cells(EPCs)for preventing restenosis formation of carotid artery in New Zealand white rabbit models.Methods EPCs of New Zealand white rabbits were isolated,confirmed and expanded though the injured carotid arterial endothelium of rabbit model induced by dilatation with a 2.5 F balloon;and then EPCs were transplanted into the injured endothelium of the cells transplantation group(n=13,3 of them were transplanted with fluorencently-labeled- EPCs),while equal volume of saline without EPCs was injected into the injured endothelium in the control group(n=8).Histopathology was performed at 4 days after transplantation for the 2 rabbits,with fluorencently-labeled-EPCs.All of the rest remained rabbits were killed 4 weeks later for histological examinations.Results The histopathological slides showed that the fluorescence-positive expression existed in the injured endothelium 4 days after transplantation.At 4 weeks after the EPCs transplantation,there were less restenosis and less vascular wall thickening in the rabbits of cells transplantation group than those of the control group(P＜0.01).Conclusion The local interventional homografting heterogeneous endothelial progenitor cells can prevent restenosis after the carotid artery angioplasty in New Zealand White rabbit model. (J Intervent Radiol,2007,16:95-98)

Gene therapy offers the promise of curing the HIV-infected patients. Specific, potent, and sustained short hairpin RNA (shRNA)-mediated gene silencing is crucial for the successful application of RNA interference technology to therapeutic interventions. To reduce the probability of viral escape mutants, in this study, we constructed lentiviral vector containing vpr and tat shRNA, respectively, furthermore the bispecific lentiviral vector harboring vpr and tat shRNA expression cassettes from U6 promotor and H1 promotor was cotransfected with recombinant plasmid expressing the vpr and tat gene. The result showed that the bispecific lentiviral vector plvx-vpr-tatshRNA could inhibit the vpr and tat effectively,with ratios of 89.20% and 62.00% respectively. When cotransfected with pNL4-3 in 293T cell, plvx-vpr-tatshRNA showed higher efficacy in down regulating the HIV NL4-3 packaging production than the plvx-vprshRNA or plvx-tatshRNA individually. MT4 cell clones transduced with recombinant lentiviral vectors were screened and challenged with HIV NL4-3. P24 ELISA test showed that MT4 transduced with the combinational lentiviral vector could inhibit virus replication efficiently.
Cell Line ; Down-Regulation ; Genetic Therapy ; Genetic Vectors ; genetics ; metabolism ; HIV Infections ; therapy ; virology ; HIV-1 ; genetics ; metabolism ; Humans ; Lentivirus ; genetics ; metabolism ; RNA Interference ; RNA, Small Interfering ; genetics ; metabolism ; therapeutic use ; tat Gene Products, Human Immunodeficiency Virus ; genetics ; metabolism ; vpr Gene Products, Human Immunodeficiency Virus ; genetics ; metabolism

BACKGROUNDMicroRNAs (miRNAs) are small noncoding regulatory RNAs whose aberrant expression may be observed in many malignancies. However, few data are yet available on human primary medulloblastomas. This work aimed to identify that whether miRNAs would be aberrantly expressed in tumor tissues compared with non-tumorous cerebellum tissues from same patients, and to explore a possible role during carcinogenesis.

METHODSA high throughput microRNA microarray was performed in human primary medulloblastoma specimens to investigate differentially expressed miRNAs, and some miRNAs were validated using real-time quantitative RT-PCR method. In addition, the predicted target genes for the most significantly down- or up-regulated miRNAs were analyzed by using a newly modified ensemble algorithm.

RESULTSNine miRNA species were differentially expressed in medulloblastoma specimens versus normal non-tumorous cerebellum tissues. Of these, 4 were over expressed and 5 were under expressed. The changes ranged from 0.02-fold to 6.61-fold. These findings were confirmed using real-time quantitative RT-PCR for most significant deregulated miRNAs (miR-17, miR-100, miR-106b, and miR-218) which are novel and have not been previously published. Interestingly, most of the predicted target genes for these miRNAs were involved in medulloblastoma carcinogenesis.

CONCLUSIONSMiRNAs are differentially expressed between human medulloblastoma and non-tumorous cerebellum tissue. MiRNAs may play a role in the tumorigenesis of medulloblastoma and maybe serve as potential targets for novel therapeutic strategies in future.

Adolescent ; Child ; Child, Preschool ; Female ; Humans ; Male ; Medulloblastoma ; genetics ; MicroRNAs ; genetics ; metabolism ; Oligonucleotide Array Sequence Analysis ; Reverse Transcriptase Polymerase Chain Reaction

The aim of the study is to evaluate the effects of the single and mixed decoction of Thallus laminariae (kelp) and Glycyrrhiza glabra (licorice) on the metabolism and their difference. The mixed decoction of kelp and licorice and the single decoction were made and intragastrically administered to the SD rats. The effect on system metabolism, the toxicity of liver and kidney were assessed by GC-MS profiling of the endogenous molecules in serum, routine biochemical assays and histographic inspection of tissues from SD rats, separately. The mixed decoction of kelp and licorice induced more obvious pathological abnormalities in SD rats than a single decoction of kelp, while the extracts of licorice did not show any pathological change. Neither the mixed, nor the single decoction showed abnormal histopathology. After intragastric administration of extracts for 5 days, the mixed decoction induced a decrease of ALT (no significant change in the groups of single decoction) and an increase of BUN (so did the single decoction of kelp). Metabolomic profile of the molecules in serum revealed that the metabolic patterns were all obviously affected for the three groups, i.e., the mixed and single decoction of kelp and licorice. The rats given with the single decoction of kelp showed a similar pattern to that of the mixed decoction, indicating that the kelp primarily contributed the perturbation of metabolism for the mixed decoction. All three groups induced a decrease of branched chain amino acids, TCA cycle intermediates and glycolysis intermediates (e.g., pyruvic acid and lactic acid) and an increase of 3-hydroxybutyric acid. Kelp decoction showed stronger potential in reducing TCA cycle intermediates and glycolysis intermediates than the other two groups, while the levels of branched chain amino acids were the lowest after licorice extracts were given. These results suggested that the effect of the mixed decoction on metabolism was closely associated with both kelp and licorice. The continuous administration of single decoction of kelp and the mixed decoction of licorice and kelp resulted in pathological abnormalities in kidney of SD rats. The mixed decoction of kelp and licorice distinctly perturbed sera molecules and hence system metabolism, which showed associated with those of kelp and licorice. Although the metabolic effect was associated with both kelp and licorice, the results suggested kelp contributed to it primarily.
Animals ; Glycyrrhiza ; chemistry ; Kelp ; chemistry ; Kidney ; drug effects ; Liver ; drug effects ; Metabolomics ; Plant Preparations ; pharmacology ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo explore the method of repairing segmental ear helix defect.

METHODSTwenty-one patients with segmental ear helix defect were repaired with post-auricular skin flap. In the first stage operation, ear helix defect was assessed, including the anterior and posterior area defect. According to the defect, post-auricular skin flap was designed and transplanted to repair the defect. Six weeks later, the pedicle of the post-auricular skin flap was cut off, elevated, and folded to form the helix. The secondary defect was directly sutured or repaired with skin graft.

RESULTSTwenty-one patients were treated with this method. In two to 12 months follow-up, all flaps survived and reconstructed ear helices were in good shape. The reconstructed ears were in symmetry to the healthy ones.

CONCLUSIONThe method is safe and effective for the correction of segmental ear helix defect.

Adolescent ; Adult ; Ear Auricle ; injuries ; surgery ; Ear, External ; surgery ; Female ; Humans ; Male ; Reconstructive Surgical Procedures ; methods ; Skin Transplantation ; Surgical Flaps ; Treatment Outcome ; Young Adult

OBJECTIVETo investigate the lymph nodes distribution and metastatic pattern of the ultra-low rectal cancer after neoadjuvant therapy.

METHODSA total of 21 rectal cancer gross specimen after neoadjuvant therapy and 23 rectal cancer gross specimen without neoadjuvant therapy were investigated by whole mount section and tissue microarray techniques with CK20. All the patients were treated by abdominoperineal resection.

RESULTSThere were 138 lymph nodes retrieved from the mesorectum in the neoadjuvant group including 39 metastatic lymph nodes and 12 micro-metastatic lymph nodes. Among these nodes, there were 7 rectal cancer cases with lymph nodes and 2 cases with micro-metastatic lymph nodes, and 6 cases had pathological complete remission. There were 415 lymph nodes retrieved from the mesorectum in the group without neoadjuvant therapy including 169 metastatic lymph nodes and 59 micro-metastatic lymph nodes. Among these nodes, there were 12 rectal cancer cases with lymph nodes and 4 cases with micro-metastatic lymph nodes. The proportions of metastatic lymph nodes in outer zone between the two groups were 21.5% and 29.0%, and those in pre-zone were 17.6% and 17.2% respectively. The ratio of metastatic lymph nodes in ischiorectal fossa between the two groups were 25.0% vs. 22.2% respectively. The rate of metastatic or micro-metastatic lymph nodes cases between the two groups were 4.8% vs. 13.0% respectively.

CONCLUSIONSThe lymph nodes distribution and metastatic pattern of the ultra-low rectal cancer are affected by neoadjuvant therapy. The proportions of the anal sphincter invasion and metastatic or micro-metastatic lymph nodes in ischiorectal fossa are lower after neoadjuvant therapy. Abdominoperineal resection as the standard treatment of the ultra-low rectal cancer after neoadjuvant therapy should be re-evaluated.

Biopsy ; Digestive System Surgical Procedures ; Humans ; Lymph Nodes ; pathology ; Lymphatic Metastasis ; Neoadjuvant Therapy ; Rectal Neoplasms ; pathology ; therapy

OBJECTIVETo perform in vitro magnetic resonance imaging on magnetic iron oxide (Fe(2)O(3)-PLL) labeled rabbit peripheral blood endothelial progenitor cells (EPCs).

METHODSFe(2)O(3) was incubated with PLL for 2 hours to form Fe(2)O(3)-PLL. Rabbit peripheral blood mononuclear cells (MNCs) were isolated and EPCs were selected by adherence method, expanded and incubated with Fe(2)O(3)-PLL. Intracellular iron was detected by Prussian blue stain and under electron microscope. MTT assay was used to evaluate cell survival and proliferation of Fe(2)O(3)-PLL labeled EPCs. Flow cytometry was used to analysis cell cycle and apoptosis. The cells underwent in vitro MR imaging with various sequences.

RESULTSIron-containing intracytoplasmatic vesicles could be observed clearly with Prussian blue staining and electron microscope observation. Survival, life cycle and apoptosis values obtained by MTT and flow cytometry analysis were similar among unlabelled EPCs and EPCs labeled with various concentrations Fe(2)O(3)-PLL. The signal intensity on MRI was significantly decreased in labeled cells compared with that in unlabeled cells. The percentage change in signal intensity (DeltaSI) was most significant on T(2)*WI and DeltaSI was significantly lower in cells labeled for 7 days than that labeled for 1 day.

CONCLUSIONSThe rabbit peripheral blood EPCs can be labeled with Fe(2)O(3)-PLL without significant change in viability and proliferation. The labeled EPCs can be imaged with standard 1.5 T MR equipment. The degree of MR signal decreasing may indirectly reflect the cells count, growth state and division.

Animals ; Biomarkers ; Blood Cells ; Cells, Cultured ; Endothelial Cells ; cytology ; Ferric Compounds ; Magnetic Resonance Imaging ; methods ; Male ; Rabbits ; Stem Cells ; cytology

OBJECTIVETo introduce a modified surgery for total auriculoplasty and the experience in one hundred and forty-six cases (155 ears).

METHODSThe procedure was a two-stage operation. The first stage involved fabrication and grafting of a costal cartilage framework. A U-shaped skin incision was made on the posterior edge of the lobule and the remnant ear cartilage was removed completely. The area for the insertion of the cartilage framework was undermined. Skin flaps were sutured after insertion of the cartilage framework. The second-stage surgery was usually performed six months after the first-stage operation. The reconstructed auricle was elevated, and a costal cartilage block was fixed to the posterior part of the auricle. A temporoparietal fascia flap was then used to cover the costal cartilage block. Finally, the posterior aspect of the projected auricle was covered with a spit-thickness skin graft.

RESULTSThe incisions healed in one hundred and forty-one patients (150 ears) after the first stage operation. Partial necrosis of the postauricular flap was observed in five cases (5 ears) after the first stage operation, but no exposure or absorption of the cartilage took place. The skin grafts survived in one hundred and thirty-nine cases (147 ears) after the second-stage surgery. Partial necrosis of the skin graft was observed in seven cases (8 ears), but healed after one-week of dressing changes. Ninety-four cases (97 ears) were followed up, but fifty-two cases (58 ears) were lost to follow up. The follow-up at six months to two years showed satisfactory contour and projection of the constructed ears.

CONCLUSIONThis two-stage surgery is simple and ideal for auricloplasty with few complications.

Adolescent ; Adult ; Aged ; Child ; Child, Preschool ; Ear Auricle ; surgery ; Ear, External ; surgery ; Female ; Humans ; Male ; Middle Aged ; Reconstructive Surgical Procedures ; methods ; Skin Transplantation ; methods ; Surgical Flaps ; Young Adult

OBJECTIVETo investigate a method for total reconstruction of auricle.

METHODS90 patients (101 ears) with congenital microtia underwent two-stage operations for auricular reconstruction. The first stage involved fabrication and grafting of autologous costal cartilage, removing the remnant ear cartilage, embedding the framework into local flap of the mastoid region, transferring the remnant ear lobule flap to link to the inferior framework. The second stage was creating an auriculocephalic sulcus. The reconstruction was performed 4 - 12 months after the first surgery. Skin incision was made 5 mm lateral side of the posterior margin of the auricle. The ear framework carrying a thick ear fascia was separated from the side of the head, the frames of the costal cartilage banked at the first operation were harvested, shaved and transplanted to the posterior wall of the concha with sutures; adjust stand position and angle, so that made the ear shape, position, axis, close to the healthy ear, and auriculocephalic angle was slightly larger than the contralateral ear. Two random flap was designed with superior on the root of the helix and in the inferior-posterior direction of the inferior mastoid area, two flapes were elevated and transplanted to posterior auricular sulcus to cover the grafted cartilage. Skin graft was performed in the remaining raw surface.

RESULTSA total of 90 patients were operated, all of 101 constructed ears achieved satisfied or near satisfied shapes. Five cases of partial skin flap necrosis were caused by pedicle impairment. Exposure of cartilage framework happened in two cases. The auriculocephalic sulcus of four cases diminished after the second stage operation. Three month to two-year follow-up of 67 patients showed that the reconstructed ears were satisfied with the results, including good shapes and steady auriculocephalic angles.

CONCLUSIONSThe method is a simple, safe and reliable method for total aural reconstruction.

Cartilage ; surgery ; Child ; Congenital Microtia ; surgery ; Ear Auricle ; surgery ; Ear Cartilage ; surgery ; Humans ; Reconstructive Surgical Procedures ; methods ; Skin Transplantation ; Surgical Flaps