Immunohistochemistry was carried out for assessment of the expression of IgG4 and IgG in 29 patients with Hashimoto's thyroiditis (HT) and 26 other patients with subacute thyroiditis,thyroid adenoma,and thyroid carcinoma.HT group were divided into IgG4 HT (10/29) and non-IgG4 HT (19/29) groups.Statistical analyses of clinical and histological characteristics were also conducted in both groups.2 cases of subacute thyroiditis were IgG4 positive (2/26).The IgG4 positive plasma cells,IgG positive plasma cells,and ratio of IgG4 +/IgG + plasma cells in IgG4 HT cases were significantly higher than non-IgG4 HT ones(P＜0.05).The serum Fl4 in IgG4 HT cases were lower than non-IgG4 HT ones(P＜0.05).After operation,IgG4 HT had a greater proportion for accepting thyroxin treatment(P＜0.05).IgG4 HT is a new-found disease which has particular histological and immunological features and would have good response for cortical hormone therapy.Serum and tissue examination of IgG4 seems to be helpful to the diagnosis of IgG4 HT.

Objective To investigate the expression and significance of elastin and fibulin-5 in anterior vaginal tissue of women with pelvic organ prolapse (POP). Methods Between November 2006 and June 2008, 68 patients with POP underwent surgical treatment in Shengjing Hospital of China Medical University were enrolled in this study, who were classified into 10 patients with grade Ⅰ , 21 patients with grade Ⅱ , 25 patients with grade Ⅲ and 12 patients with grade Ⅳ in accordance with pelvic organ prolapse quantitation (POP-Q). Meanwhile, 18 cases with early cervical cancer at stage of Ⅰ b were treated by total hysterectomy and bilateral salpingo-oophorectomy, their anterior vaginal tissues were selected as controls. Immunohistochemical staining was performed to detect the expression of elastin and fibulin-5. Results (1 ) Elastin and fibulin-5 were mainly expressed at extracellular matrix(ECM). (2)The positive rate of fibulin-5 expression in anterior vaginal wall were 5% (2/37 ) in grade Ⅲ/Ⅳ and 26% (8/31 ) in grade Ⅰ/Ⅱ POP patients, which reached statistical difference (P = 0. 035). However, no statistical different expression was found between postmenopausal (13%, 8/60) and non-menopausal patients (2/8), vaginal delivery ≤ 2 (19%, 5/27 ) and ＞ 2 patients (12%, 5/41, P ＞ 0. 05 ). (3 ) The positive rate of elastin expression in anterior vaginal wall in POP group was 31% (21/68), which was significantly lower than 72% (13/18) of control group (P = 0. 002). Among POP group, 19% (7/37) of elastin expression in grade Ⅲ/Ⅳ POP was significantly lower than 45% (14/31 ) in grade Ⅰ/Ⅱ of POP patients. However, no statistical difference was found between postmenopausal (30%, 18/60 ) and non-menopausal patients (3/8 ), vaginal delivery ≤ 2 (26%, 7/27) and ＞2 patients(34%, 14/41, P＞0. 05). (4)In POP group, both positive expression of fibulin-5 and elastin of anterior vaginal wall was in 6 cases, both negative expression of fibulin-5 and elastin was in 43 cases. It was illustrated that elastin and fibulin-5 had an positive relationship (P = 0. 031 ). Conclusion The decreased expression of elastin and fibolin-5 was correlated with degree of POP, which indicated that elastin and fibulin-5 may play a role in the pathogenesis of POP.

Plant cells response to water deficit through a variety of physiological processes. In this work, we studied the function of microtubule cytoskeleton during dehydration/rehydration cycle in moss (Atrichum undulatum) protonemal cells as a model system. The morphological and cytological change of protonemal cells during dehydration and rehydration cycle were first investigated. Under normal conditions, protonemal cells showed bright green colour and appeared wet and fresh. Numerous chloroplasts distributed regularly throughout the cytoplasm in each cell. After dehydration treatment, protonemal cells lost most of their chlorophylls and turned to look yellow and dry. In addition, dehydration caused plasmolysis in these cells. Upon rehydration, the cells could recover completely from the dehydrated state. These results indicated that moss had a remarkable intrinsic ability to survive from the extreme drought stress. Microtubule, an important component of cytoskeleton, is considered to play crucial roles in the responses to some environmental stresses such as cold and light. To see if it is also involved in the drought tolerance, dynamic organization of microtubules in protonemal cells of Atrichum undulatum subjected to drought and rehydration were examined by indirect immunofluorescence combined with confocal lasersharp scanning microscopy. The cortical microtubules were arranged into a fine structure with a predominant orientation parallel to the long axis of the cells in the control cells. After dehydration, the microtubule organization was remarkablly altered and the fine microtubule structure disappeared whereas some thicker cables formed. When the cells were grown under rehydration conditions, the fine microtubule arrays reappeared. These results provided a piece of evidence that microtubules play a role in the cellular responses to drought stress in moss. Furthermore, we analyzed the effects of the microtubule-disrupting agent colchicine on the morphology recovery of the protonemal cells during rehydration process. The cells were incubated with colchicine, followed by drought stress treatment and rehydration in the presence of colchicine to prevent recovery of microtubule organization. Results from immunofluorescence showed that microtubule arrays were broken down into smaller fragments. Compared to the cells treated with drought stress alone, the cells treated with drought stress in the presence of colchicine could not recover after rehydration treatment. The morphology resembled those of the drought treated cells, with obvious plasmolysis phenomena and loss of chlorophyll content. These results support the notion that microtubules were involved in the deccication tolerance mechanism in Atrichum undulatum.
Bryophyta ; metabolism ; physiology ; Droughts ; Gene Expression Regulation, Plant ; physiology ; Microscopy ; Microtubules ; metabolism

OBJECTIVETo analyze the frequency and clinical significance of ABL tyrosine kinase point mutations in chronic myeloid leukemia (CML) patients receiving imatinib treatment.

METHODSNested reverse transcriptase-polymerase chain reaction (RT-PCR) was performed on 40 bone marrow samples from 23 patients to amplify the ABL kinase domain, followed by direct sequencing and sequence homologous analysis.

RESULTSIn the 23 patients analyzed, the ABL domain point mutations was detected in 7 patients who presented with 5 types of nucleotide changes, namely T315I(n=3), Y253H, E255K, F317L and G321W. The incidence of mutations in chronic phase (CP), accelerated phase (AP) and blast phase (BP) was 25.00%, 40.00% and 30.00%, respectively. For 6 of the 7 patients with mutations who were resistant to imatinib before sequencing, the daily drug dose had been increased to 600-800 mg daily for poor response to 400 mg/day imatinib. During the follow-up for 3-6 months, only the patient with F317L achieved major cytogenetic response (MCR), and the patient with Y253H and 1 of the 3 with T315I progressed to BP. The newly diagnosed patient with G321W IN cp achieved a complete hematologic remission and had a significant decrease of the proportion of BCR-ABL-positive cells.

CONCLUSIONSABL kinase point mutation is an important mechanism of imatinib resistance. The type of mutations is associated with the level of resistance to imatinib, and detection of ABL kinase point mutations by direct sequencing may help estimate the prognosis and plan for therapeutic strategy adjustment.

Antineoplastic Agents ; therapeutic use ; Base Sequence ; Benzamides ; Drug Resistance ; genetics ; Female ; Humans ; Imatinib Mesylate ; Leukemia, Myelogenous, Chronic, BCR-ABL Positive ; drug therapy ; genetics ; Male ; Molecular Sequence Data ; Piperazines ; therapeutic use ; Point Mutation ; Protein-Tyrosine Kinases ; genetics ; Pyrimidines ; therapeutic use

n increasing trend.

Perimenopause is a vulnerable stage for emotional disorders such as anxiety and depression,which is the result of a combination of bio-psycho-social factors,and it seriously affect the quality of life of perimenopausal women.Therefore,finding safe and effective treatments is one of the urgent problems in modern medicine.This paper summarises the etiology and treatment of emotional disorder in perimenopause in Chinese and western medicine,and on this basis,this paper discusses the clinical diagnostic and treatment strategies and research ideas of acupuncture in treating emotional disorder in perimenopause,thus providing a new idea for the prevention and treatment of emotional disorder in perimenopause.

Endo-periodontal lesions(EPLs)involve both the periodontium and pulp tissue and have complicated etiologies and pathogenic mechanisms,including unique anatomical and microbiological characteristics and multiple contributing factors.This etiological complexity leads to difficulties in determining patient prognosis,posing great challenges in clinical practice.Furthermore,EPL-affected teeth require multidisciplinary therapy,including periodontal therapy,endodontic therapy and others,but there is still much debate about the appropriate timing of periodontal therapy and root canal therapy.By compiling the most recent findings on the etiology,pathogenesis,clinical characteristics,diagnosis,therapy,and prognosis of EPL-affected teeth,this consensus sought to support clinicians in making the best possible treatment decisions based on both biological and clinical evidence.

BACKGROUNDThe rapid transmission and high mortality rate made severe acute respiratory syndrome (SARS) a global threat for which no efficacious therapy is available now. Without sufficient knowledge about the SARS coronavirus (SARS-CoV), it is impossible to define the candidate for the anti-SARS targets. The putative non-structural protein 2 (nsp2) (3CL(pro), following the nomenclature by Gao et al, also known as nsp5 in Snidjer et al) of SARS-CoV plays an important role in viral transcription and replication, and is an attractive target for anti-SARS drug development, so we carried on this study to have an insight into putative polymerase nsp2 of SARS-CoV Guangdong (GD) strain.

METHODSThe SARS-CoV strain was isolated from a SARS patient in Guangdong, China, and cultured in Vero E6 cells. The nsp2 gene was amplified by reverse transcription-polymerase chain reaction (RT-PCR) and cloned into eukaryotic expression vector pCI-neo (pCI-neo/nsp2). Then the recombinant eukaryotic expression vector pCI-neo/nsp2 was transfected into COS-7 cells using lipofectin reagent to express the nsp2 protein. The expressive protein of SARS-CoV nsp2 was analyzed by 7% sodium dodecylsulfate polyacrylamide gel electrophoresis (SDS-PAGE). The nucleotide sequence and protein sequence of GD nsp2 were compared with that of other SARS-CoV strains by nucleotide-nucleotide basic local alignment search tool (BLASTN) and protein-protein basic local alignment search tool (BLASTP) to investigate its variance trend during the transmission. The secondary structure of GD strain and that of other strains were predicted by Garnier-Osguthorpe-Robson (GOR) Secondary Structure Prediction. Three-dimensional-PSSM Protein Fold Recognition (Threading) Server was employed to construct the three-dimensional model of the nsp2 protein.

RESULTSThe putative polymerase nsp2 gene of GD strain was amplified by RT-PCR. The eukaryotic expression vector (pCI-neo/nsp2) was constructed and expressed the protein in COS-7 cells successfully. The result of sequencing and sequence comparison with other SARS-CoV strains showed that nsp2 gene was relatively conservative during the transmission and total five base sites mutated in about 100 strains investigated, three of which in the early and middle phases caused synonymous mutation, and another two base sites variation in the late phase resulted in the amino acid substitutions and secondary structure changes. The three-dimensional structure of the nsp2 protein was successfully constructed.

CONCLUSIONSThe results suggest that polymerase nsp2 is relatively stable during the phase of epidemic. The amino acid and secondary structure change may be important for viral infection. The fact that majority of single nucleotide variations (SNVs) are predicted to cause synonymous, as well as the result of low mutation rate of nsp2 gene in the epidemic variations, indicates that the nsp2 is conservative and could be a target for anti-SARS drugs. The three-dimensional structure result indicates that the nsp2 protein of GD strain is high homologous with 3CL(pro) of SARS-CoV urbani strain, 3CL(pro) of transmissible gastroenteritis virus and 3CL(pro) of human coronavirus 229E strain, which further suggests that nsp2 protein of GD strain possesses the activity of 3CL(pro).

Animals ; COS Cells ; Cysteine Endopeptidases ; biosynthesis ; chemistry ; genetics ; Genetic Variation ; Humans ; Models, Molecular ; Recombinant Proteins ; biosynthesis ; Reverse Transcriptase Polymerase Chain Reaction ; SARS Virus ; chemistry ; genetics ; Severe Acute Respiratory Syndrome ; drug therapy ; X-Ray Diffraction

Objective To explore the establishment of the mimetic aging effect in guinea pigs induced by D-galactose, and to detect the biological indicatrix associated with hearing loss and provide a new tool for molecular pathogenesis of hearing loss.Methods Total of 51 guinea pigs were randomly divided into three groups: group A ( model aging group , n = 25) , which were injected with D-galactose (200 mg ·kg-1·d-1 ) by intra peritoneum for 6 weeks, group B ( model control group , n = 18), which were given the same amount of saline only, and group C(vacant group, n = 15) were not treated.Then, The guinea pigs in group A and B were exposed in noise for 8 days, 8 hours once a day.Auditory brainstem response (ABR) was used to test the hearing threshold of guinea pigs thrice, first before the drug administered, then after 6 weeks the drug used, third after noise exposure.And colorimetry was used to analyze the activity of superoxide dismutase (SOD) and malon dialdehyde (MDA) in brain and liver tissue.The DNA of inner ear tissue was harvested and amplified fragment length polymorphism (AFLP) was used to detect the differential polymorphic markers.Results After injection, there was no significant difference in elevation of ABR threshold between the group A and group B ( t = 1.14, P>0.05 ).However, exposure of noise later, elevation in ABR threshold of ( 22.97±10.56) dB PeSPL was observed in group A, and ( 14.16±7.36) dB peSPL in group B.The was significant difference in variation of hearing threshold between group A and group B ( t = 2.78 ,P<0.05 ).The activity of SOD in brain and liver tissue in group A was lower than that in group B.the level of MDA was opposite between group A and group B.The difference between group A and group B was significant ( P<0.01 ) .A differential polymorphic marker was observed by AFLP. Conclusions The mimetic aging effect of the guinea pigs can be induced by D-galactose, and this model can not directly induce the hearing loss.The differential polymorphic marker possibly act as a predisposing factor which can greatly enhance the sensitivity of the ear to the noise.