OBJECTIVETo evaluate the associations of human leukocyte antigen (HLA) DQB1 gene with onset age and autoantibodies in type 1 diabetes mellitus(T1DM) in Chinese Han population in Sichuan area.

METHODSForty-six type 1 diabetic patients and 52 healthy control subjects were involved in this study. HLA-DQB1 typing was performed by polymerase chain reaction-sequence specific primer(PCR-SSP). Glutamic acid decarboxylase antibody (GADA) and islet cell antibody (ICA) were qualitatively analyzed by enzyme linked immunosorbent assay (ELISA).

RESULTSThe positive rate of DQB1*0201 was higher in T1DM than in controls (OR=18, P<0.005), but those of DQB1*0601, *0602 were higher in controls than in T1DM(OR=0.07, 0.31 respectively, both P<0.05).The positive rate of DQB1*0602 in type 1 diabetic patients with onset age>or=20 years was higher than that in the patients with onset age <20 years (P<0.05). GADA was more frequent in DQB1*0201(+) patients than in DQB1*0201 (-) patients (P<0.025).

CONCLUSIONThe findings show that DQB1*0201 is susceptible to T1DM, whereas DQB1*0601, *0602 are protective in Chinese Han population in Sichuan area. DQB1*0602 may delay the onset of T1DM. The positive rate of DQB1*0201 correlates positively with that of GADA.

Adolescent ; Adult ; Age of Onset ; Autoantibodies ; immunology ; Child ; Child, Preschool ; China ; epidemiology ; Diabetes Mellitus, Type 1 ; epidemiology ; genetics ; immunology ; Enzyme-Linked Immunosorbent Assay ; Female ; Genetic Predisposition to Disease ; genetics ; Glutamate Decarboxylase ; immunology ; HLA-DQ Antigens ; genetics ; HLA-DQ beta-Chains ; Humans ; Male ; Membrane Glycoproteins ; genetics ; Middle Aged ; Polymerase Chain Reaction ; Young Adult

One pair of degenerate primer was designed according to conserved motifs of the psaB (A2 subunit of photosystem I) of Chlamydomonas reinhardtii, Chlamydomonas moewusii, Chlorella vulgaris and Mesostigma viride, and a total RNA of Dunaliella salina (D. salina) was extracted with TRIzol reagent. A cDNA fragment, about 1.8kb in length, from green algal D. salina was obtained through RT-PCR method. The resulting PCR product was cloned into T-vector and screened to determine its sequence. Homologous analysis of the deduced amino acid sequence was performed by BLAST and subsequeqtly compared with GenBank data. The obtained cDNA sequence was 1815 bp long, which encodes 605 amino acids (GenBank accession number: AY820754). The sequence shared high homologue with the following psaB: Chlamydomonas reinhardtii 92%, Chlamydomonas moewusii 91%, Chlorella vulgaris 86%, Mesostigma viride 85%, Physcomitrella patens subsp. Patens 85% and Nephroselmis olivacea 84%. It can be concluded that the cloned sequence is psaB cDNA fragment from D. salina.
Algal Proteins ; genetics ; Amino Acid Sequence ; Animals ; Chlamydomonas reinhardtii ; genetics ; Chlorophyta ; genetics ; metabolism ; Cloning, Molecular ; DNA, Complementary ; genetics ; Molecular Sequence Data ; Photosystem I Protein Complex ; genetics ; Sequence Analysis, Protein ; Sequence Homology, Amino Acid

[Objective] To improve the understanding of CT and MRI features of giant cell reparative granuloma of temporal bone and reduce misdiagnosis.[Methods] The CT and MR images of 4 cases of GCRG of temporal bone were analyzed,compared with their operation and pathology results.[Results] All the lesions of the 4 cases were located in the anterior and lower parts of the temporal bone with widely destruction.The CT images showed expansive destruction of bone with disruption of osseous shell,strip and punctate calcification and ossification in and around the lesion,and osteosclerosis of the adjacent bone,which consistent with the scope of the operation.The MR images showed a large patchy of low signal intensity on both T1-weighted and T2-weighted images,which showed heterogeneous enhancement after injection of contrast.Fibrous proliferation with multiple multinuclear giant cells and hemosiderin deposition were showed under microscope.[Conclusion] The morphological and pathological characteristics of recurrent intraosseous hemorrhage and parcels of granulation tissue in GCRG of the temporal bone could be reflected by CT and MR images,which has certain characteristics and is of important significance to the diagnosis of the tumor.

OBJECTIVETo assess the effects of rhBNP on left ventricular (LV) remodeling in rats with acute myocardial infarction (AMI).

METHODSAMI was induced by ligating coronary artery in male Sprague Dawley rats. Two days after surgery, AMI rats received intravenous infusion of rhBNP (15 microg/kg or 5 microg/kg once daily, n = 15 each) or saline (placebo control, n = 15) through Jugular Vein. Sham-operated rats (n = 15) served as normal control. Four weeks later, hemodynamic measurements were performed, left ventricular weight (LVW), ratio of left ventricular weight to body weight (LVW/BW), left ventricular diameter (LVD) and infarct size were determined. Plasma angiotensin II and myocardial angiotensin II levels were also measured.

RESULTSCompared with sham-operated rats, LVW, LVW/BW, LVD and myocardial angiotensin II level were significantly increased, while the LV systolic pressure (LVSP), +/- dp/dt were significantly reduced in saline treated AMI rats (all P < 0.05). LVW/BW, MI size, LVD and myocardial angiotensin II in rhBNP treated AMI rats were significantly lower [LVW: (492.6 +/- 34.0) mg, (498.8 +/- 47.8) mg, (570.0 +/- 24.2) mg, P < 0.01; LVW/BW: 2.0 +/- 0.2, 2.0 +/- 0.2, 2.3 +/- 0.1, P < 0.01; LVD: (25.3 +/- 2.9)%, (31.4 +/- 3.0)%, (46.4 +/- 3.0)%, P < 0.01; myocardial angiotensin II: (881.3 +/- 62.7) pg/L, (1186.0 +/- 94.5) pg/L, (2436.7 +/- 280.3) pg/L, P < 0.05], while LVSP and +/- dp/dt in rhBNP treatment groups were significantly increased than saline treated AMI rats (P < 0.05 or P < 0.01).

CONCLUSIONRhBNP is effective in attenuating left ventricular remodeling after AMI in rats.

Animals ; Disease Models, Animal ; Male ; Myocardial Infarction ; drug therapy ; physiopathology ; Natriuretic Peptide, Brain ; therapeutic use ; Rats ; Rats, Sprague-Dawley ; Recombinant Proteins ; therapeutic use ; Ventricular Remodeling ; drug effects

OBJECTIVETo evaluate the relationship between circulating levels of insulin-like growth factor-1 (IGF-1), IGF-binding protein-3 (IGFBP-3) and colorectal cancer.

METHODSA meta-analysis of 6 epidemiological studies on insulin-like growth factors and risk of colorectal cancer were performed.

RESULTSThe pooled odds ratio (OR) of IGF-1 and IGFBP-3 were 1.56 (95% CI: 1.14-2.13) and 0.78 (95% CI: 0.43-1.44) respectively. According to the results from different measurements (enzyme-linked immunoabsorbent assay and immunoradiometric assay), the pooled OR were 1.92 and 1.23 for IGF-1, 0.46 and 1.44 for IGFBP-3 respectively.

CONCLUSIONHigh serum levels of IGF-1 were independent risk factors of colorectal cancer but the OR of IGFBP-3 was not statistically significant. The heterogeneity between studies on IGFBP-3 and colorectal cancer was caused by different measurements used, but there was still a need to conduct simultaneous large size study under 2 different measurements for further conclusion.

China ; epidemiology ; Colorectal Neoplasms ; blood ; epidemiology ; Enzyme-Linked Immunosorbent Assay ; methods ; Insulin-Like Growth Factor Binding Protein 3 ; blood ; Insulin-Like Growth Factor I ; metabolism ; Radioimmunoassay ; Risk Factors

Abdominal Wall ; pathology ; Humans ; Male ; Mesentery ; pathology ; Middle Aged ; Ossification, Heterotopic ; etiology ; Postoperative Complications ; etiology ; Tomography, X-Ray Computed

AIMTo study the microbial transformation of sinenxan A.

METHODSChoose two strains of Fungi (Mucor spinosus AS 3.3450 and Cunninghamella echinulata AS 3.3400) and a strain of bacterium (Proteus vulgaris AS 1.1208) to transform the substrate.

RESULTSThree products were obtained and identified as 10-deacetylsinenxan A1, 6 alpha-hydroxy-10-deacetylsinenxan A2 and 9 alpha-hydroxy-10-deacetylsinenxan A3 respectively.

CONCLUSIONSinenxan A is facile to be transformed by microorganisms, the 10-acetyl group of which is an active group.

Acetates ; isolation & purification ; metabolism ; Biotransformation ; Culture Techniques ; Cunninghamella ; metabolism ; Diterpenes ; isolation & purification ; metabolism ; Mucor ; metabolism ; Plants, Medicinal ; chemistry ; Proteus vulgaris ; metabolism ; Taxus ; chemistry

OBJECTIVETo explore novel pathogenic mutation in the mitochondrial DNA gene in diabetic pedigree.

METHODSTwenty-eight suspected mitochondrial DNA diabetic families were recruited. The gene fragment was produced by PCR, and mutation was detected by direct sequencing.

RESULTSIn one pedigree, the proband and her mother were found carrying the most common nt3243 A --> G mutation and another 16S rRNA 3205C --> T mutation. But only 3205C --> T was found in her affected brother. All the two patients were deaf and developed diabetes in early age, characterized by impaired beta cell function and low body mass index (BMI). The proband had relatively higher lactic acid concentration than normal individuals. A novel ND1 gene 3434 A --> G(TAT --> TGT) mutation was explored in another proband with deafness and her affected family members.

CONCLUSION16SrRNA 3205C --> T mutation was found in a mitochondrial diabetes mellitus pedigree, implying its potential pathogenic role in diabetes. Another novel ND1 3434 A --> G mutation was found in another diabetic pedigree. Because this mutation causes amino acid change (Tyr --> Cys) and is co-segregated with diabetes, it may be diabetogenic.

Adult ; Asian Continental Ancestry Group ; genetics ; DNA Mutational Analysis ; DNA, Mitochondrial ; genetics ; Diabetes Mellitus ; genetics ; Female ; Humans ; Male ; Middle Aged ; Mutation ; Pedigree ; RNA, Ribosomal, 16S ; analysis ; genetics

Objective To assess the functional changes of the hind paw after SD rats being cut offthe L5 spinal nerve by CatWalk gait analysis.Methods Eleven male SD rats were chosen; the right side of these rats,as the experimental side,was cut the ventral root and dorsal root of L5 spinal nerve,while the left side was without any operation.One day after the operation,whether the models were successfully constructed was verified by tracer experiment with wheat germ agglutinin horseradish peroxidase (WGA-HRP) in 3 rats; 1 day before the operation and 3 months after the operation,the changes of such parameters as general parameters,individual paw parameters,pain-related parameters and coordination-related parameters were assessed by using CatWalk gait analysis.Results The WGA-HRP-labeled motoneurons and fibers were not found in posterior horn and anterior horn of the experimental side of L5 spinal gray matter,but both located in the left side,indicating that the models were constructed successfully.General parameters,individual paw parameters and pain-related gait parameters could be recorded 3 months after the operation,but no statistically significant difference was noted as compared with those 1 day before the operation; however,significant decrease of values of regularity index (RI) and coupling diagonal right after-left front in rats 3 months after the operation was noted as compared with those 1 day before the operation (P＜0.05).Conclusion Only a part of coordination-related gait parameters (the lower limbs) is influenced after being cut L5 spinal nerve;therefore,L5 spinal nerve can be used for constructing of a bladder reflex arc.