10.3969/j.issn.1007-3969.2013.04.005

Objective ToinvestigatethevalueofimagetextureanalysisbasedonconventionalMRimagesinthedifferentialdiagnosisof intracranialsolitaryfibroustumor/hemangiopericytoma(SFT/HPC)andvascularmeningiomas.Methods 12casesofSFT/HPCand 16casesofvascularmeningiomaconfirmedbypathologywerecollected.Variousdiscriminantanalysismethodsandimagetextureanalysis techniqueswereappliedtopre-operativeroutineMRIimagesofthebrain,andthebesttextureparameterswereselectedtoclassify cases,includinglineardiscriminantanalysis(LDA),nonlineardiscriminantanalysis(NDA),principalcomponentanalysis(PCA)and rawdataanalysis(RDA).Finally,thebestclassificationsequencetextureparameterswerechosenforstatisticalanalysis.Results The enhancedT1WIwasthebestclassificationsequence.ThePOE+ACC methodhadthelowestmisclassificationrate.Theabsolutegradient skewness,theautocorrelationofthecooccurrencematrix,andthevarianceofthehistograminthetexturefeaturesoftheSFT/HPC andvascularmeningiomasweredifferent(P<0.05).Conclusion ThatbasedontheconventionalMRimagetextureanalysiscanprovidemore quantitativeinformation,anew methodandideafortheidentificationofintracranialSFT/HPCandvascularmeningioma.

OBJECTIVETo evaluate the endourological technique in the treatment of bilateral malignant ureteric obstruction.

METHODSThe data of 43 patients (totally, 70 cases) with bilateral malignant ureteric obstruction treated with endoluminal therapy were reviewed retrospectively. Of 70 cases, 38 were treated by retrograde double-J stenting, 24 by minimally invasive percutaneous nephrotomy (MPCN) and 8 by antegrade double-J stenting.

RESULTSAll patients were followed up for an average of 12 months. The retrograde double-J stenting, MPCN and antegrade double-J stenting was successfully performed in 50.0% (19/38), 100.0% (24/24) and 62.5% (5/8), respectively. Technical failures in placing retrograde double-J stent were too difficult to identify the ureteric orifice (13/38) or failing to cross the obstruction site because of severe extraluminal compression (6/38). Failure in placing antegrade double-J stent was due to severe extraluminal compression (3/8). Dislodgment of nephrostomy tubes (11/19) was the major factor which limited the application of MPCN.

CONCLUSIONIt is safe and effective to treat malignant ureteric obstruction with endourological technique, and suggested initially with retrograde double-J stenting. If malignant ureteric orifice occlusion or a severe extraluminal compression is showed in the imaging, MPCN or antegrade double-J stenting may be selected according to the site and the extent of obstruction.

Aged ; Aged, 80 and over ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Nephrostomy, Percutaneous ; methods ; Prostatic Neoplasms ; complications ; Retrospective Studies ; Stents ; Stomach Neoplasms ; complications ; Treatment Failure ; Treatment Outcome ; Ureteral Obstruction ; etiology ; surgery ; Urinary Bladder Neoplasms ; complications ; Uterine Cervical Neoplasms ; complications

OBJECTIVETo investigate the efficiency and safety of two-dose steroid combined with two-dose daclizumab and tacrolimus (FK506) regimen in liver transplant recipients.

METHODSThere were 74 patients who treated in the First Affiliated Hospital of Sun Yat-Sen University from September 2006 to March 2008. Expect for 7 patients who didn't measure up, 67 adult liver transplant recipients were randomized into two groups: conventional protocol group (n = 35) in which steroid was withdrawn in 3 months after operation, and two-dose steroid group (n = 32). Comparison of rejection, infection (bacteria, fungal and cytomegalovirus) and metabolic complications rates were studied between two groups.

RESULTSThere were significant differences between two groups in the rate of early postoperation hyperglycemia, the average dosage of insulin consumption among hyperglycemia recipients as well as the rate of diabetes mellitus, hypertension and infection during the follow-up period (P < 0.05). The rate of hypertension in early postoperation period, hyperlipemia and rejection rate during the follow-up period were similar in two groups (P > 0.05).

CONCLUSIONSTwo-dose steroid combined with two-dose daclizumab and tacrolimus would be a safe and efficient immunosuppression strategy without increase the acute rejection rate hazard, that could reduce post-transplant infection and other complications from side-effect of long-term usage of steroid.

Adult ; Aged ; Antibodies, Monoclonal ; administration & dosage ; therapeutic use ; Antibodies, Monoclonal, Humanized ; Female ; Graft Rejection ; prevention & control ; Humans ; Immunoglobulin G ; administration & dosage ; therapeutic use ; Immunosuppression ; methods ; Immunosuppressive Agents ; administration & dosage ; therapeutic use ; Liver Transplantation ; Male ; Methylprednisolone ; administration & dosage ; therapeutic use ; Middle Aged ; Steroids ; administration & dosage ; therapeutic use ; Tacrolimus ; administration & dosage ; therapeutic use

OBJECTIVETo investigate the effect of implant superstructure with platform switching to the osseointegration of implant-bone interface in immediate loading.

METHODSThe bilateral mandiblular fourth premolars of 5 beagle dogs were extracted, and 3 months later, 10 implants were implanted and the abutments were accessed immediately to form immediate loading. Using self-control, the abutment with platform switching was used in the experimental side, and the traditional abutment used in the control side. The experimental animals were sacrificed after 3 months, and non-decalcified implant-bone sections were made.

RESULTSA favorable osseointegration of implant-bone interface in 4 animals (8 implants) was observed except for one failed case. A large number of osteoblasts and different mineralized bone were observed. In experimental side, the bone and implant-neck were nearly in the same level, but the bone around the implant-neck was significantly absorbed in control side.

CONCLUSIONSUsing different superstructure in immediate loading could affect the osseointegration of implant-neck. The platform switching technology is conducive to the keeping of implant-neck bone.

Animals ; Bicuspid ; Bone and Bones ; Dental Implants ; Dogs ; Mandible ; Osseointegration

OBJECTIVETo select the optimal pregnancy time window of embryonic pig skin precursor tissue for xenotransplantation and study its ability in wound repair.

METHODSSkin precursor tissues were obtained from pig fetus of fetal age of 35, 42, 56, 70 days, and were minced into microskin and transplanted to dorsal wounds of BALB/c nude mice, then they were covered with residual skin after plastic surgery of patients or adult pig skin (white). The characteristics of growth and development were observed after transplantation. Pathological examination was performed on 6 and 12 post operation weeks respectively to observe the tissue structure and tumorigenicity.

RESULTSSkin precursor tissues from fetal pig survived and developed after transplantation, and the microskin fused. New tissue area from skin precursor tissues with fetal age of 42 days was (47 +/- 6) mm2, which was higher than that of 35 days (18 +/- 8 mm2), 56 days (31 +/- 12 mm2), 70 days (20 +/- 8 mm2, P < 0.05). The skin precursor developed into "intact skin" with hair, sebaceous glands and sweat glands, and melanocytes were also detected in epidermis. The newly-grown skin tissue included epidermal and dermal layer, and obvious dermal papillae. Teratoma was not found after transplantation in skin precursor tissue with fetal age of 56, 70 days.

CONCLUSIONFetal pig skin precursor tissue with fetal age of 56 days can be used to repair wound as xenotransplantation.

Animals ; Fetal Tissue Transplantation ; Fetus ; Gestational Age ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Skin Transplantation ; Swine ; Transplantation, Heterologous ; Wound Healing

ObjectiveTo evaluate the expression level of DNA damage repair gene FANCI in hepatocellular carcinoma （HCC） and its relationship with prognosis， clinical stage and immune infiltration. MethodsIn this study， TCGA， GTEx， TIMER2.0， HPA database and qRT-PCR， western blot and immunohistochemistry were used to analyze the expression of FANCI in HCC and its correlation with different clinical stages； Kaplan-Meier Plotter database was used to explore the relationship between FANCI and the prognosis of HCC； the TISIDB database was used to analyze the relationship between FANCI and immune cell infiltration and immune checkpoints in HCC； the STRING database was used to detect the protein binding with FANCI； the TCGA and GTEx databases were used for GO and KEGG enrichment analysis； Cell experiments were used to explore the role of FANCI in HCC. ResultsCompared with normal tissues， the mRNA and protein expression levels of FANCI in tumor tissues were up-regulated （P<0.001）； and HCC patients with high expression of FANCI had poor prognosis （P<0.001）； the expression of FANCI in tumor tissues was positively correlated with the number of activated CD4⁺ T cells， the number of Th2 cells and the expression of immune checkpoints， and B-cell and macrophage infiltration was significantly lower in the FANCI high expression group （P<0.01）； GO and KEGG enrichment analysis showed that FANCI-related genes were enriched in various biological processes such as amino acid transmembrane transporter activity； Cell experiments showed that knockdown of FANCI could inhibit the proliferation， invasion and migration of HCC （P<0.05）. ConclusionsFANCI is highly expressed in hepatocellular carcinoma tissues， which may play a role in suppressing anti-tumor immunity and acting on pathways such as amino acid transmembrane transport， and is associated with poor prognosis. The proliferation， invasion and migration ability of hepatocellular carcinoma are inhibited after knocking down FANCI.

Background: Human infections with zoonotic coronaviruses (CoVs), including severe acute respiratory syndrome (SARS)-CoV and Middle East respiratory syndrome (MERS)-CoV, have raised great public health concern globally. Here, we report a novel bat-origin CoV causing severe and fatal pneumonia in humans. Methods: We collected clinical data and bronchoalveolar lavage (BAL) specimens from five patients with severe pneumonia from Jin Yin-tan Hospital, Wuhan, Hubei province, China. Nucleic acids of the BAL were extracted and subjected to next-generation sequencing. Virus isolation was carried out, and maximum-likelihood phylogenetic trees were constructed. Results: Five patients hospitalized from December 18 to December 29, 2019 presented with fever, cough, and dyspnea accompanied by complications of acute respiratory distress syndrome. Chest radiography revealed diffuse opacities and consolidation. One of these patients died. Sequence results revealed the presence of a previously unknown β-CoV strain in all five patients, with 99.8–99.9% nucleotide identities among the isolates. These isolates showed 79.0% nucleotide identity with the sequence of SARS-CoV (GenBank NC_004718) and 51.8% identity with the sequence of MERS-CoV (GenBank NC_019843). The virus is phylogenetically closest to a bat SARS-like CoV (SL-ZC45, GenBank MG772933) with 87.6–87.7% nucleotide identity, but is in a separate clade. Moreover, these viruses have a single intact open reading frame gene 8, as a further indicator of bat-origin CoVs. However, the amino acid sequence of the tentative receptor-binding domain resembles that of SARS-CoV, indicating that these viruses might use the same receptor. Conclusion: A novel bat-borne CoV was identified that is associated with severe and fatal respiratory disease in humans.