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ABSTRACT: To determine the kinetics of infection and cyst formation in CD1 mice following oral infection with cyst-forming Chinese isolate of Toxoplasma gondii TgCtwh1(genotype China 1, ToxoDB#9).
50 CD1 female mice were obtained from specific pathogen-free (SPF) mouse colony in the Vital River Laboratories (VRL), Beijing. Mice were randomly divided into 10 groups each with 5 mice. All mice but control were peroral gavage infected with 50 cysts (1x10(4) bradyzoites) of TgCtwh1 isolate of T. gondii isolated from Wuhan, China. Cysts were isolated from the entire brain of mice infected with TgCtwh1 by density gradient centrifugation over Fycoll-paque plus. Animals were orally inoculated with cysts on day zero, and peripheral blood, lymph nodes, heart, liver, and brain of infected mice were collected on days 2, 4, 7, 10, 14, 21, 35, 50, and 72 post infection. Five mice were sacrificed by cervical dislocation under anesthesia at each time of collection, and the kinetic distribution was detected by fluorescence quantitative PCR and tissue inoculation into fresh mice. The cyst formation at various intervals after infection was also observed, as was the number of the cysts in brains and the cyst-forming rate.
The body weight of the mice lessened (3.650 +/- 0.252)g post oral infection on day 7, and the weight was progressively decreased between day 10 [(1.730 +/- 0.017)g] and day 14 [(-0.390 +/- 0.554) g] after infection (P<0.05). In the brain tissue, cysts were first observed on day 21 post oral infection and the cyst-forming rate was 80%, and the average diameter of cysts was 20-40 microm. While on day 35 after infection, the cysts were formed in all infected mice(cyst-forming rate was 100%) and the average diameter was 50-60 microm. In chronicinfection, DNA copies of parasites were first detected in blood, heart, liver and lymph node at 3.51 +/- 0.152, 4.100 +/- 0.198, 4.220 +/- 0.209 and 4.960 +/- 0.052 respectively on day 2, then in the brain on day 4 (3.800 +/- 0.154). During the early days of infection, the parasite burden in blood was progressively increased until days 7 (5.240 +/- 0.115) then gradually decreased and become undetectable on day 35. The burden of T. gondii in the heart and brain tissues increased significantly andreached their maximum on day 14 (5.640 +/- 0.214) and day 10 (5.790 +/- 0.060), respectively, and remained a stable level thereafter. Liver and lymph tissues reached their maximum on day 7 (5.310 +/- 0.038) and day 10 (6.200 +/- 0.152), then gradually decreased and become undetectable on day 50.
The parasitemia in mice infected with T. gondii cyst-forming isolate lasts for 21 d at least, and cysts are detected in brain on day 21.
Zhongguo ji sheng chong xue yu ji sheng chong bing za zhi = Chinese journal of parasitology & parasitic diseases 06/2012; 30(3):179-83.
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ABSTRACT: T cell immunoglobulin domain and mucin domain (Tim) family, a new gene that expresses on the surface of T cells, plays a critical role in regulation of T cells response. Previous data have shown that Tim-3 expressed on Th1 cells promotes itself apoptosis. Tim-2 is preferentially up-regulated during Th2 differentiation and functions as a potent costimulatory molecule for T-cell immunity. The present study aims to learn whether Tims are responsible for Th2-biased response evoked by Schistosoma japonicum infection. The expressions of Tim-2 and Tim-3 in spleen lymphocytes from S. japonicum-infected mice were examined, and the possible role of galectin-9-Tim-3 pathway in Th2-biased response triggered by schistosome infection was discussed. Our results showed that Tim-2 mRNAs were up-regulated in the spleen of schistosome-infected mice, which coincided with elevated IL-4 gene expression. Administration of galectin-9 significantly induced apoptosis of naïve spleen lymphocytes with down-regulation IFN-γexpression in vitro. Additionally, Tim-3-Fc fusion protein notably enhanced Th1 cells and decreased Th2 cells in vitro. Thus, we concluded that pro-apoptotic effects on Th1 population through galectin-9-Tim-3 pathway and the up-regulation of Tim-2 on Th2 cells might be critical to Th2-biased response of host with schistosomiasis japonica.
Immunology letters 03/2012; 144(1-2):60-6. · 2.91 Impact Factor
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ABSTRACT: To investigate the expression of CC chemokine receptor 1(CCR1) on the immune cells in orbital tissue of patients with thyroid associated ophthalmopathy(TAO).
The tissue samples of orbital tissue were collected from 25 cases of TAO patient and 10 normal control subjects, and the expression of CCR1 in the immune cells was studied by SP immunohistochemistry. The correlation between CCR1 and clinical activity scores (GAS) was analyzed.
The expression of CCR1 on immune cells was positive, in orbital tissue of patients with TAO, and the positive rate was 84%, while it was negative or low positive in normal control subjects. The difference between them was significant (P < 0.05). In addition, the expression of CCR1 on the immune cells of orbital tissue with TAO had significant correlation with CAS (P < 0.05).
The expression of chemokine receptor CCR1 on the immune cells in orbital tissue of TAO patients is higher than that of normal subjects. CCR1 may play a role in the pathogenesis of TAO.
Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition 03/2012; 43(2):180-2.
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ABSTRACT: To investigate the expression of chemokine receptor (CCR1) in the orbital fibroblasts (OFs) with thyroid associated ophthalmopathy (TAO) and to explore the pathogenesis of TAO.
By immunohistochemistry, the expression of CCR1 was studied in 25 cases of TAO patients and 10 normal control subjects and the correlation between CCR1 and GAS was analysed.
The expression of CCR1 in the OFs with TAO was positive, but it was negative or weak positive in normal control subjects. The difference between them was significant (P < 0.05). And the expression of CCR1 in the OFs with TAO had no significant correlation with GAS (r = 0. 048, P > 0.05).
The expression of chemokine receptor CCR1 is higher on OFs of TAO patients than that of normal subjects. CCR1 maybe play a role in pathogenesis of TAO.
Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition 09/2011; 42(5):630-2.
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ABSTRACT: Schistosomiasis remains a major parasitic disease, with 200 million people infected and 779 million people at risk worldwide. The lack of reliable diagnostic techniques makes this disease difficult to control. In an attempt to discover useful candidates for the diagnosis of schistosomiasis, proteomics in combination with western blotting were employed in this study. This serological proteome assay yielded more than 30 immunodominant spots. Ten of these spots were precisely matched with a homologous two-dimensional electrophoresis (2-DE) gel and successfully identified by LC/MS-MS as corresponding to four different proteins. Of these proteins, SjLAP and SjFBPA were successfully expressed, and their recombinant protein products were further applied in the diagnosis of human Schistosomiasis japonica using ELISA. The ELISA results revealed sensitivities of 98.1% and 87.8% for acute and chronic schistosomiasis with rSjLAP and 100% and 84.7% with rSjFBPA, whereas the assays showed a specificity of 96.7% with both recombinant proteins. After treatment with praziquantel, the titres of the antibodies against both antigens declined significantly (P<0.001). Our data therefore suggest that these antibody-oriented recombinant proteins had a high efficacy for the diagnosis of S. japonica, and 2-DE based screening followed by LC/MS-MS has promising potential in the screening of candidate antigens for the diagnosis of schistosomiasis.
Acta tropica 05/2010; 116(1):1-8. · 2.22 Impact Factor
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ABSTRACT: The aim of the study was to investigate the role of src-suppressed C kinase substrate (SSeCKS) in the modulation of rat pulmonary microvascular endothelial cells (RPMVEC) permeability elicited by interleukin (IL)-1β and tumor necrosis factor (TNF)-α.
The gene expression of SSeCKS was analyzed by reverse transcription-polymerase chain reaction. Immunoblotting was used to determine the SSeCKS protein expression and the activation of the protein kinase C (PKC) signaling pathway. A RPMVEC monolayer was constructed to determine changes of transendothelial electrical resistance (TER) and FITC-dextran flux (P (d)) across the monolayer. SSeCKS-specific small interfering RNA was transfected into RPMVEC.
IL-1β and TNF-α activated the PKC signaling pathway in RPMVEC, and up-regulated the gene and protein expression of SSeCKS. Depletion of endogenous SSeCKS in RPMVEC significantly attenuated cytokine-induced decrease in TER and increase in P (d), but not to the basal levels. PKC inhibitors also significantly decreased cytokine-induced hyperpermeability and SSeCKS expression.
SSeCKS is involved in the endothelial hyperpermeability induced by IL-1β and TNF-α in inflammatory process.
Agents and Actions 05/2010; 59(11):949-58. · 1.59 Impact Factor
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ABSTRACT: A number of flies around the eyes of a person or around a fruit bait were collected from Huangshan Mountain, and experimentally infected by newborn larvae of Thelazia callipaeda. After 20 days, the flies were examined for T. callipaeda. Following dissection, 3 (30%, 3/10) of Amiota magna, and 55 (21.6%, 55/255) of A. okada were found infected by T. callipaeda. The susceptibility of T. callipaeda is similar in the two species fruit flies (chi2=0.0584, P> 0.05). The rabbits were infected by infective larvae of T. callipaeda from A. magna. At the 35th day after infection, the newborn larvae and worms of T. callipaeda were found in the conjunctival sac of rabbits. This study suggested that A. magna acts as intermediate host of T. callipaeda under laboratory conditions.
Zhongguo ji sheng chong xue yu ji sheng chong bing za zhi = Chinese journal of parasitology & parasitic diseases 08/2009; 27(4):375-6.
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ABSTRACT: Type 2 cytokine interleukin (IL)-13 and its decoy receptor, IL-13 receptor (R) alpha2 appear to play a major role in tissue fibrosis of schistosomiasis and asthma. IL-13 is a key regulator of the extracellular matrix (ECM). It is known to signal to cells by binding to the IL-13Ralpha1, which then heterodimerizes with IL-4Ralpha. In contrast, IL-13Ralpha2 binds IL-13 with high affinity but does not signal. IL-13Ralpha2 is known to down-regulate granulomatous inflammation and prolong host survival in Schistosoma mansoni (S. mansoni) infection, but little is known about the location and expression level of IL-13Ralpha2 in the context of S. japonicum infection.
We established S. japonicum-infected mouse models. Kinetic serum levels of IL-13Ralpha2 were examined with ELISA. IL-13Ralpha2 mRNA and protein of liver tissues were determined by PCR and immunoblotting analysis, respectively. Detection of IL-13Ralpha2 expression and location in macrophages was performed by TaqMan PCR and fluorescent immunocytochemistry technique, respectively.
A marked elevation of mRNA and protein expression of IL-13Ralpha2 was observed in mice during S. japonicum infection. An enhanced expression of IL-13Ralpha2 was further demonstrated in primary macrophages of murine schistosomiasis.
IL-13Ralpha2 in macrophages may be a critical contributor to pathogenesis of schistosomiasis. The data highlight the potential importance of cell signaling and antifibrotic gene therapeutics in T helper 2 cell (Th2)-mediated diseases.
Chinese medical journal 08/2009; 122(14):1650-4. · 0.86 Impact Factor
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ABSTRACT: To prepare eukaryotic expression of rotavirus (RV) SA11 capsid protein VP7, and to generate and purify yolk immunoglobulin (IgY) antibodies against the recombinant VP7 from Roman hens.
MA104 cells were infected with the standard SA11 strain and the culture fluid was collected. A DNA fragment of 978 bp encoding SA11 VP7 was obtained by RT-PCR amplification from genomic RNA of RV SA11. The PCR products were ligated to pMD18-T vector following the confirmation by DNA sequencing and sub-cloned into pPICZalphaB. The recombinant pPICZalphaB-SA11 VP7 was transformed into E coli Top10. The plasmids were linearized by digestion of BstXI and transformed into Pichia pastoris X-33 through electroporation by DNA sequencing. The transformants were induced with methanol for expression. The cultural supernatant was subjected to SDS-PAGE and Western blotting. Fusion expression was purified through the column of affinity chromatography. IgY was identified and purified by SDS-PAGE and Western blotting from eggs of Roman hens immunized with recombinant SA11 VP7.
The RNA extracted from the RV culture fluid consisted of 11 bands visualized by silver staining. The expression vector pPICZalphaB-SA11 VP7 was constructed and the fusion protein in Pichia pastoris X-33 was harvested and purified. The recombinant SA11 VP7 with molecular weight of 40 200 was identified by Western blotting. The IgY antibodies against the recombinant SA11 VP7 were produced with a purity of 95 percent and yield of 10.2 mg per egg.
The preparation of IgY antibodies to recombinant SA11 VP7 might lay a foundation for the development of vaccines and diagnostic techniques.
Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine] 06/2009; 43(6):526-30.
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ABSTRACT: To investigate the effects of rh-leptin on the proliferation, migration of orbital preadipocytes of thyroid associated ophthalmopathy (TAO).
Preadipocytes were cultured from orbital tissues of TAO patients after orbital decompression. The subcultured preadipocytes were incubated with different concentrations of rh-leptin. The proliferation of preadipocytes was tested by methyl thiazlyl tetrazolium (MTT) assay, and the migration was evaluated by crutch method.
With the treatment of 500 mg/L rh-leptin, the preadipocytes proliferated more than control (P<0.05), while 10-100 mg/L rh-leptin has no such significant effects. The migration of the preadipocytes was enhanced by rh-leptin, which showed statistic difference in 50-500 mg/L rh-leptin groups when compared with control group (P<0.05).
Rh-leptin could improve the proliferation and migration of TAO orbital preadipocytes in vitro, which suggests that leptin may play an important role in the pathogenesis of TAO.
Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition 12/2008; 39(6):933-5.
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ABSTRACT: To investigate the inhibitory effects of hepatitis B virus (HBV) replication and expression by transfecting artificial microRNA (amiRNA) into HepG2.2.15 cells.
Three amiRNA-HBV plasmids were constructed and transfected into HepG2.2.15 cells. HBV antigen secretion was detected in the cells with transient and stable transfection by time-resolved fluoroimmunoassays (TRFIA). HBV DNA replication was examined by fluorescence quantitative PCR, and the level of HBV S mRNA was measured by semi-quantitative RT-PCR.
The efficiency of transient transfection of the vectors into 2.2.15 cells was 55%-60%. All the vectors had significant inhibition effects on HBsAg and HBeAg at 72 h and 96 h after transfection (P < 0.01 for all). The secretion of HBsAg and HBeAg into the supernatant was inhibited by 49.8% +/- 4.7% and 39.9% +/- 6.7%, respectively, at 72 h in amiRNA-HBV-S608 plasmid transfection group. The copy of HBV DNA within culture supernatant was also significantly decreased at 72 h and 96 h after transfection (P < 0.01 for all). In the cells with stable transfection, the secretion of HBsAg and HBeAg into the supernatant was significantly inhibited in all three transfection groups (P < 0.01 for all, vs negative control). The copies of HBV DNA were inhibited by 33.4% +/- 3.0%, 60.8% +/- 2.3% and 70.1% +/- 3.3%, respectively.
In HepG2.2.15 cells, HBV replication and expression could be inhibited by artificial microRNA targeting the HBV S coding region. Vector-based artificial microRNA could be a promising therapeutic approach for chronic HBV infection.
World Journal of Gastroenterology 08/2008; 14(29):4684-9. · 2.47 Impact Factor
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ABSTRACT: To investigate the mechanism of paeoniflorin in preventing hepatic granuloma formation and fibrosis in mice infected with Schistosoma japonicum.
Model of hepatic granuloma and fibrosis was established by infecting mice with S. japonicum cercariae. The infected mice were randomly divided into 4 groups: group A as model (infected control) group (15 mice), and paeoniflorin being given before, simultaneously and after praziquantel treatment as groups B, C and D. Each of the groups B, C and D was subdivided into 3 subgroups (15 mice each): low dose (paeoniflorin 2 ml, 30 mg/(kg x d) x 30 d), high dose(paeoniflorin 2 ml, 120 mg/(kg x d) x 30 d) and control (2 ml, 0.5% sodium carboxymethylcellulose x 30 d). In group B, paeoniflorin or sodium carboxymethylcellulose was orally administrated on 12 d after infection. In groups C and D, paeoniflorin or sodium carboxymethylcellulose was administrated on 42 d or 72 d after infection. Each of group B, C and D was orally given praziquantel 2 ml (500 mg/(kg x d) x 2 d) on 42 d after infection. On the 102nd day after infection, all animals were sacrificed by cervical dislocation. Serum hyaluronic acid (HA) was detected by radioimmunoassay; area of egg granuloma and degree of hepatic fibrosis were observed via HE and Masson stainings; the expression of transforming growth factor beta1 (TGF-beta1), alpha smooth muscle actin (alpha-SMA and collagen I (Col I) protein were measured by immunohistochemical method.
In group B, the level of HA (0.719 +/- 0.239 microg/ml, 0.721 +/- 0.182 microg/ml) in low or high dose subgroups was significantly lower (F = 9.429, P < 0.01) than the control subgroup (1.049 +/- 0.286 microg/ml); the area of granuloma (0.066 +/- 0.005 mm2, 0.064 +/- 0.004 mm2) or the degree of hepatic fibrosis (2.067 +/- 0.458, 1.967 +/- 0.399) in low or high dose subgroups was significantly greater (F = 862.540, F = 29.738, P < 0.01) than the control (0.141 +/- 0.008 mm2, 3.467 +/- 0.834); the expression of alpha-SMA positive cells (2.933 +/- 0.594, 3.000 +/- 0.535) in low or high dose subgroups was significantly lower (F = 12.323, P < 0.01, P < 0.01) than its control (4.800 +/- 1.859); the expression of TGF-beta1 (0.256 +/- 0.057, 0.274 +/- 0.054) in low or high dose subgroups was significantly lower (F = 148.990, P < 0.01) than its control (0.552 +/- 0.047); the content of Col I (0.334 +/- 0.041, 0.339 +/- 0.042) in low or high dose subgroups was significantly lower (F = 180.881, P < 0.01) than its control (0.601 +/- 0.049). In groups C & D, no significant difference was found between the low or high dose subgroups or between the subgroups and their corresponding controls.
Paeoniflorin can significantly reduce hepatic granuloma formation and fibrosis due to schistosome eggs, and decrease the expression of TGF-beta1, alpha-SMA in mice when it is given before praziquantel administration, which may associate with the activation of hepatic stellate cells and the expression of TGF-beta1 in liver tissue.
Zhongguo ji sheng chong xue yu ji sheng chong bing za zhi = Chinese journal of parasitology & parasitic diseases 02/2008; 26(1):10-5, 20.
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ABSTRACT: To investigate clinical manifestation, diagnosis and treatment of orbital natural killer (NK)-T cell lymphoma.
It was a retrospective case series. Seven orbital NK-T cell lymphoma patients confirmed by surgical biopsies were collected during the past 22 years. We reviewed the records, surgical and treatment procedures. Surgical specimens were studied with HE staining, immunohistochemical staining and molecular biological analysis.
These patients had proptosis, eye motive inhibition or fixation and visual acuity was decreased or even without light perception. Skin of inner canthus and eyelids appeared red and swollen, with ulceration and cavity formation. CT scan revealed that the tumor showed uneven density and an unclear border. Tremendous lymphocyte infiltration and tissue necrosis in the tumor were observed in the biopsy tissue. LCA, CD45RO and CD57 immunohistochemical staining revealed positive results. Clonal T-cell-receptor gene rearrangements of two patients showed negative results and the Epstein-Barr virus was detected.
Orbital NK-T cell lymphoma is a rare disease. The characteristics of this disease include a highly aggressive clinical course, severe destruction and a poor prognosis. The final diagnosis depends on HE staining, immunohistochemical staining and molecular biological examination.
[Zhonghua yan ke za zhi] Chinese journal of ophthalmology 02/2008; 44(1):42-5.
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ABSTRACT: To express signaling protein Sj14-3-3 in Pichia pastoris and compare its antigenicity with prokaryotic expression one.
Sj14-3-3 gene was amplified from pET28a-Sj14-3-3 recombinant plasmid, cloned into vector pMD18-T followed by sequencing. The Sj14-3-3 gene was subcloned into the expression vector pPICZalpha-B and transformed into Pichia pastoris X-33 by electroporation. The transformants were identified by sequencing. Three transformants with high copies were obtained when selected under zeocin, and expression was induced with methanol. The culture supernatant was collected and tested by SDS-PAGE and Western blotting. The specificity and sensitivity of eukaryotic expression rSj14-3-3 in Pichia pastoris were compared with that from prokaryotic expression by detecting sera of patients with schistosomiasis by indirect ELISA.
The Sj14-3-3 gene was integrated into Pichia pastoris, and the gene of interest detected by PCR was with 1 300 bp. After induction by methanol, the Sj14-3-3 gene was expressed and secreted into the medium. The molecular weight of the recombinant protein was determined as about Mr 35 000 by SDS-PAGE. Western blotting showed that the protein has a high specificity against mouse-anti-Sjl4-3-3 monoclonal antibody. The recombinant protein had a promising immune reactivity. Indirect ELISA showed that by using eukaryotic expression rSj14-3-3 in Pichia pastoris, the positive rate in 36 cases of acute schistosomiasis was 81%, with no cross-reactivity in 12 cases of Clonorchis sinensis, 9.3% cross-reactivity in 32 cases of normal sera. While using prokaryotic expression rSj14-3-3 in E.coli, the positive rate in 36 cases of acute schistosomiasis was 88.9%, with 16.7% cross-reactivity in 12 cases of Clonorchis sinensis, 12.5% cross-reactivity in 32 cases of normal sera. There was no statistically significant difference of the results (P>0.05).
The recombinant protein Sj14-3-3 of eukaryotic expression in Pichia pastoris has been successfully harvested and shows a promising immunological potential.
Zhongguo ji sheng chong xue yu ji sheng chong bing za zhi = Chinese journal of parasitology & parasitic diseases 03/2007; 25(1):12-6.
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ABSTRACT: To investigate the effects of dexamethasone (DEX) on the expression of intercellular adhesion molecule-1 (ICAM-1) in orbital fibroblasts (OF) from patients with thyroid associated ophthalmopathy (TAO).
OFs from 10 patients with TAO and from 5 normal control subjects were cultured in vitro. OFs were incubated with DEX, IFN-gamma or DEX and IFN-gamma compound for 72 hours. Flow cytometry analyses were performed to determine ICAM-1 expression.
Baral ICAM-1 expression in OFs from TAO was significantly higher than that in the controls. DEX (10(-6) mol/L) inhibited expression of ICAM-1. IFN-gamma (300 U/ mL) stimulated ICAM-1 expression significantly, which was inhibited by DEX (10(-6) mol/L).
ICAM-1 plays an important role in the pathogenesis of TAO. DEX not only inhibits ICAM-1 expression, but also inhibits IFN-gamma-induced ICAM-1 expression on cultured OF in vitro. This may be part of the mechanism by which glucocorticoid has efficacy in the treatment of TAO.
Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition 02/2007; 38(1):113-5.
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ABSTRACT: To evaluate the expression of glucocorticoid receptor alpha (GRalpha) and beta (GRbeta) messenger RNA (mRNA) in orbital tissues from thyroid associated ophthalmopathy (TAO).
Samples of extraocular muscle and orbital fat were obtained from 17 patients with TAO and 10 healthy individuals. Total RNA was extracted and reversely transcripted into cDNA. The expression of GRalpha and GRbeta mRNA was detected by means of fluorescent quantitative polymerase chain reaction (PCR).
Expression of GRalpha mRNA was much higher than GRbeta mRNA in all extraocular muscle and orbital fat biopsies. The relative copy of GRalpha was 40.15 +/- 11.37 in TAO patients and 20.64 +/- 7.07 in the controls. GRalpha: GRbeta mRNA ratio of these two groups was 77.76 +/- 18.77 and 148.34 +/- 23.86, respectively. There was significant difference between these two groups (P < 0.05). No significant difference was noted between extraocular muscle and orbital fat biopsies, between glucocorticoid-treated and non-treated patients or among hyperthyroidism, hypothyroidism and euthyroidism (P > 0.05).
The increased expression of GRalpha mRNA and decreased GRalpha: GRbeta ratio in orbital tissues may play an important role in the pathogenesis of TAO and the effects of glucocorticoid treatment.
[Zhonghua yan ke za zhi] Chinese journal of ophthalmology 02/2007; 43(1):40-3.
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Qing-li Luo
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ABSTRACT: Increasing orbital fatty tissue volume and fatty cell number in patients with thyroid associated ophthalmopathy (TAO) can induce high orbital pressure, eyeball protrusion and visual acuity damage. Orbital fatty tissue as a new endocrine organ can secrete various fatty cell factors, growth factors and protein molecules. Some factors and protein molecules participate in the occurrence and progress of TAO. Therefore, we should pay high attention to study the important role of orbital fatty tissue in TAO.
[Zhonghua yan ke za zhi] Chinese journal of ophthalmology 01/2007; 42(12):1057-9.
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ABSTRACT: To investigate whether there is heterogeneous antigen-specific CD90 expressing on the surface of cultured orbital fibroblasts, and comparatively to study the distribution and proportion of CD90 positive cells in thyroid associated ophthalmopathy (TAO) and normal orbital tissue.
Human orbital fibroblasts were cultivated for normal control and TAO. Indirect immunofluorescence and flow cytometric analysis were applied to detect the levels of CD90 expression.
The CD90 antigen expressed in some of orbital fibroblasts sourced wherever from normal/TAO extraocular muscles or normal/TAO connective/adipose tissue, in which the CD90+ cell occupation was 82.95% +/- 6.49%, 80.83% +/- 7.14%, 64.55% +/- 4.45%, 59.20% +/- 1.19% respectively. There were more CD90+ fibroblasts in extraocular muscles than in connective/adipose tissue (P < 0.05), but no significant difference between normal control and TAO tissue (P > 0.05).
Orbital fibroblasts can be separated into CD90+ and CD90- subsets with respect to surface CD90 expression. The ratio of CD90+ and CD90- cells depends on their site and distribution in the orbit.
Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition 12/2006; 37(6):879-81.
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ABSTRACT: To observe indication and effectiveness of radiation therapy (RT) in the treatment of the patients with thyroid-associated ophthalmopathy (TAO).
23 patients of TAO who received RT in Sichuan University were collected from 1992 to 2004. Among those patients, 9 cases of infiltrative exophthalmos and 14 cases of compressive optic neuropathy were ineffectively with glucocorticoid treatment or could not treated with glucocorticoid, or could not perform orbital decompression due to severe diabetic mellitus or hypertension, or feared to receive the operation, all of patients were active ophthalmopathy and with short duration. Outer orbital radiation was applied using linear accelerator with Donaldson's method, radiation treatment fields was 4 cm x 5 cm, exposure energy was 2 GY fractions with total of 20 GY. In 11 cases with severe inflammation prednisone was administered during radiotherapy. Photos and CT scan were taken for each patient before and after RT.
Visual acuity (VA) of the patients was improved from before RT 0.04 - 0.2 to after RT 0.1 - 0.8 in 14 cases of compressive optic neuropathy. Extraocular muscle of patients decreased in size confirmed by CT scan. VA improvement was correlated with the degree of extraocular muscle decreased in size. Eyelid and conjunctive swelling, eyelid incompletely closure, exposure keratitis, limitation of motion and proptosis were improved after RT in 9 patients with infiltrative exophthalmos. Following up the patients for 1 - 3 years, it was found that VA decreased in 3 cases and inflammation recurred in 4 cases, eyelids could not closed in 2 cases after RT.
RT could be used in severe, active cases of TAO. If there is severe inflammation, steroids could be combined with RT therapy.
[Zhonghua yan ke za zhi] Chinese journal of ophthalmology 04/2006; 42(3):218-21.
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Qing-li Luo
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ABSTRACT: Orbital malignant lymphoma is a common orbital tumor. Because various types of lymphomas have different degrees of malignancy and clinical manifestations, and each type has a distinct treatment and prognosis, the classification of orbital malignant lymphoma is very important. Up to now the opinions on the classification of orbital lymphoma have been conflicting. We collected related materials from abroad and domestic literature, and summarized our experience of clinical and pathologic work on orbital malignant lymphoma. The work was directed by the histopathologists. Here we propose our classification and treatment protocol of orbital malignant lymphoma. This classification is a tentative one, which needs the comments of our ophthalmic colleagues.
[Zhonghua yan ke za zhi] Chinese journal of ophthalmology 11/2005; 41(10):868-70.
