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Ling Y, Zhang XQ, Ma X, Chen SY, Chen TT, Liu W. Analysis of genetic diversity among wild bermudagrass germplasm from southwest China using SSR markers. GENETICS AND MOLECULAR RESEARCH 2012; 11:4598-608. [PMID: 23096923 DOI: 10.4238/2012.october.17.5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Fifty-five wild accessions of bermudagrass (Cynodon dactylon) were collected from southwest China (Sichuan, Chongqing, Yunnan, Guizhou, and Tibet), and their genetic diversity was analyzed using simple sequence repeat markers. A total of 267 polymorphic bands were detected with 18 primer combinations. The genetic similarity among the accessions ranged from 0.688 to 0.894 with an average of 0.797. All 55 wild accessions were clustered into 7 eco-geographic groups. Our data showed that the dendrogram was almost in accordance with geographic distribution, and accessions from the same collection sites tended to be clustered into the same group. A genetic differentiation analysis revealed that the percentage of genetic variance was 70.07 and 29.93% within and among groups, respectively. Finally, we discuss the implications of these results for C. dactylon in southwest China.
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Sun Z, Sun L, Zhang Z, Ma X. Ossifying parosteal lipoma of the mandible: a case report and review of the literature. Dentomaxillofac Radiol 2012. [DOI: 10.1259/dmfr.20100331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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503
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Ma X, Li G, Cai Z, Sun W, Liu J, Zhang F. Leukemoid reaction in malignant bone tumor patients - a retrospective, single-institution study. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2012; 16:1895-1899. [PMID: 23242713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND To the Authors' knowledge, the literature regarding leukemoid reaction in patients with malignant bone tumor is sparse, and most of patients with leukemoid reaction have poor prognosis. AIM To study the leukemoid reaction in malignant bone tumor patients. MATERIALS AND METHODS A total of 105 consecutive malignant bone tumor patients with a white blood cell count > 50,000/microL were retrospectively identified over a 4-years period (2007-2010). Those patients without a secondary cause of their leukocytosis were defined as having a paraneoplastic leukemoid reaction. RESULTS Three etiologies of the leukocytosis were found in those 105 patients: the major one was paraneoplastic leukemoid reaction which accounted for 56%; the second one was hematopoietic growth factors defect accounting for 30%; 14% patients were caused by infection and Tumor bone marrow involvement. The patients diagnosed with a paraneoplastic leukemoid reaction typically had neutrophil predominance (94.8%) and radiographic evidence of metastatic diseases (78%). They were clinically stable, but had a poor prognosis. 95% either died or were discharged to hospice within 12 weeks of their initial extreme leukocyte count. Both of the 2 (2%) patients who survived over 12 weeks received effective antineoplastic therapy. CONCLUSIONS Patients with typical paraneoplastic leukemoid reaction were clinically stable despite having large tumor burdens. However, clinical outcomes were poor unless receiving an effective antineoplastic treatment.
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504
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Liu SG, Zhang SS, Zhang LQ, Li WJ, Zhang AQ, Lu KN, Wang MJ, Yan SL, Ma X. Screening of PAX8 mutations in Chinese patients with congenital hypothyroidism. J Endocrinol Invest 2012; 35:889-92. [PMID: 22293317 DOI: 10.3275/8239] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Congenital hypothyroidism (CH) is a neonatal endocrine disease with an incidence of 1:2000 to 1:4000 worldwide. In about 85% of patients CH is secondary to thyroid dysgenesis, but its pathogenesis remains unclear. Thyroid transcription factors, such as paired box transcription factor 8 (PAX8), play an important role in thyroid organogenesis and development. AIM To screen PAX8 mutations in Chinese CH patients and characterize the features of PAX8 mutations in China. MATERIALS AND METHODS Blood samples were collected from 300 CH patients in Shandong Province, China, and genomic DNA was extracted from peripheral blood leukocytes. Using PCR and direct sequencing, exon 3 and exon 4 of PAX8 were analyzed. RESULTS Analysis of PAX8 in 300 CH patients revealed heterozygous missense mutations or variations in two unrelated patients; one was a known missense mutation G92A, resulting in an arginine to histidine substitution at codon 31, the other was a missense variation G122T, resulting in the substitution of a glycine at position 41 by a valine residue. The patient with the R31H mutation had CH with thyroid hypoplasia, while the patient with the G41V variation had CH with a eutopic and normal-sized thyroid gland. CONCLUSION We report a heterozygous missense mutation and a variation in PAX8 in two out of 300 unrelated Chinese CH patients, showing that the PAX8 mutation rate is very low in CH patients in China.
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505
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Ma J, Xing D, Ma X, Xu W, Wang J, Chen Y, Song D. The percutaneous compression plate versus the dynamic hip screw for treatment of intertrochanteric hip fractures: a systematic review and meta-analysis of comparative studies. Orthop Traumatol Surg Res 2012; 98:773-83. [PMID: 23044466 DOI: 10.1016/j.otsr.2012.07.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 06/28/2012] [Accepted: 07/09/2012] [Indexed: 02/02/2023]
Abstract
BACKGROUND The use of a percutaneous compression plate (PCCP) provides a minimally invasive technique for the fixation of stable intertrochanteric femoral fractures. It has several theoretically potential advantages over the dynamic hip screw (DHS) such as shorten incision and lower incidence of wound infection. HYPOTHESIS PCCP have several advantages than DHS, such as reduced blood loss, transfusion, mortality, shorter operative time, and lower incidence of complications. This systematic review and meta-analysis was performed to identify the clinical outcomes and safety of patients with stable intertrochanteric hip fractures operated on using PCCP compared with DHS. MATERIALS AND METHODS A systematic search of all studies published through April 2012 was conducted using the Medline, Embase, Sciencedirect, OVID and the Cochrane Central database. The randomized controlled trials (RCTs) and quasi-randomised control trials (qRCTs) that compared PCCP with DHS in treating adult patients with stable intertrochanteric hip fractures and provided data on safety and clinical effects were identified. Demographic characteristics, adverse events and clinical outcomes were manually extracted from all of the selected studies. RESULTS Nine studies encompassing 914 patients met the inclusion criteria. Overall, the result of meta-analysis indicated that over DHS, PCCP allowed significantly shorter operative time, reduced blood loss as well as transfusion, diminished incidence of cardiovascular events. However, there were no significant differences in length of hospitalization, rate of walking without help, early mortality and other complications. DISCUSSION Significant differences favoring PCCP were found with regard to operative time, blood loss, transfusion and lower incidence of cardiovascular events. However, owing to the limitations of this systematic review, future RCTs are still needed to confirm this data and the clinical efficiency of PCCP. LEVEL OF EVIDENCE Level II: low-powered prospective randomized trial.
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506
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Weberpals J, Ma X, Dimitroulakos J, Djordjevic B, Lapointe-Milot K, Al Mutairi N, Pelletier L, Oza A, Squire J. 472 A Biomarker Study of Poly(ADP-ribose) Polymerase Inhibitor (PARPi) ABT-888 Activity On Ex Vivo Tissue From Ovarian Cancer Patients. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72270-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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507
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Yao J, Xiong M, Tang B, Chen G, Liang M, Ma X, Wang Z, Wu Z. Simvastatin attenuates pulmonary vascular remodelling by down-regulating matrix metalloproteinase-1 and -9 expression in a carotid artery-jugular vein shunt pulmonary hypertension model in rats. Eur J Cardiothorac Surg 2012; 42:e121-7. [DOI: 10.1093/ejcts/ezs445] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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508
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Sun L, Ren H, Liu W, Wang L, Yin Y, Li Y, Ma X, Qiu Z, Cen X, Shi Y. TRBV kinetics and its association with HLA disparity and aGVHD following allogeneic hematopoietic stem cell transplantation. Int J Lab Hematol 2012; 35:119-27. [PMID: 23062014 DOI: 10.1111/ijlh.12007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Accepted: 07/30/2012] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The relative expression of T cell receptor (TCR) beta variable (TRBV) and TCR diversity was compared between recipients receiving human leukocyte antigen (HLA)-mismatched transplants and those receiving HLA-matched transplants, using granulocyte colony-stimulating factor (G-CSF)-mobilized peripheral blood stem cells and bone marrow as grafts. METHODS The kinetics of the relative expression of TRBV family members were analyzed using real-time quantitative PCR. Additionally, the association of TRBV clonotype with acute graft-versus-host disease (aGVHD) was determined by cloning and sequence analysis of the CDR3 region. RESULTS The TCR diversity in recipients receiving HLA-mismatched transplants was significantly lower than in those receiving HLA-matched transplants at 1 month and 2 months after hematopoietic stem cell transplantation (HSCT) (both P < 0.05). However, these differences disappeared 3 months after transplantation. The relative expression of TRBV27 (n = 7 recipients) at the onset of aGVHD was higher than in corresponding donors (P = 0.025), but no significant differences were observed between recipients lacking aGVHD and their donors at serial time points after HSCT. CONCLUSION Our results suggest that HLA disparity may affect the relative expression of TRBV in the early phase after transplantation, and TRBV27 may be associated with the onset of aGVHD.
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509
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Kong R, Wang C, Ma X, Liu J, Chen W. Peptides design based on the interfacial helix of integrase dimer. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2012; 2005:4743-6. [PMID: 17281301 DOI: 10.1109/iembs.2005.1615531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
HIV-I integrase (IN) plays a crucial role in the retroviral life cycle. The peptides derived from the helix of IN were reported to have the potency of inhibition. We designed a series of peptides based on interface helices alpha1 and alpha5 with the aim of increasing their inhibitory activity. The helix-forming tendency and the affinity with IN were essential for interfacial peptide inhibitors. The MD simulation and AGADIR prediction both showed favorable results for the designed peptides. The binding mode and binding free energy of peptide and IN were investigated subsequently to test our design. The improvement in binding free energy compared with that of alpha1 and alpha5 indicates that some of the designed peptides may have a higher potency for inhibiting the dimerization of IN. This study provides some useful information for rational design of IN peptide inhibitor.
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510
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Ma X, Chen J, Li Y, OuYang Y, Wang Y, Guo S, Zhao H, Wang W, Ma X. STUDY ON THE SYNDROME BIOLOGICAL BASIS OF ESSENTIAL HYPERTENSION BASED ON LITERATURE MINING. BRITISH HEART JOURNAL 2012. [DOI: 10.1136/heartjnl-2012-302920a.239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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511
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Gielen A, Shields W, McDonald E, Frattaroli S, Bishai D, Ma X. Fire and burn risks to children: exploring the role of housing quality. Inj Prev 2012. [DOI: 10.1136/injuryprev-2012-040590a.9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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512
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Hainaut P, Ma X, Lacas B, Tsao M, Douillard J, Rousseau V, Dunant A, Seymour L, Filipits M, Graziano S. Lace-Bio Pooled Analysis of the Prognostic and Predictive Value of TP53 Mutations in Completely Resected Non Small Cell Lung Cancer (NSCLC). Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33753-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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513
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Sroga J, Ma X, Gao F, Das S. Replaceable cyclin D3 (CycD3) improves decidualization (Dcz) defects in HOXA-10-/- mice. Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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514
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Jayes F, Ma X, Leppert P. Treatment of uterine fibroids with highly purified clostridial collagenase. Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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515
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Ma X, Li J, Zhang F. Intranasal co-delivery with the mouse zona pellucida 3 and GM-CSF expressing constructs enhances humoral immune responses and contraception in mice. Scand J Immunol 2012; 76:521-7. [PMID: 22924630 DOI: 10.1111/j.1365-3083.2012.02765.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Granulocyte-monocyte colony-stimulating factor (GM-CSF) regulates the function of antigen-presenting cells (APCs) and has been broadly used as the adjuvant. Here, we tested whether intranasal delivery of GM-CSF can improve the contraception of mouse zona pellucida 3 (mZP3) DNA vaccine. Our results showed that co-administration of GM-CSF and mZP3 DNA vaccine increased the levels of secretory IgA (sIgA) and IgG antibodies in vaginal washes and serum, respectively. Co-administration enhanced Th2 responses through improving the maturation of dendritic cells. Importantly, GM-CSF significantly reduced the fertility rate and mean litter size induced by mZP3 DNA vaccine alone without interfering the normal follicular development. These data suggest that GM-CSF could be used as adjuvant to develop immunocontraceptive vaccine.
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Sa Y, Sun L, Wang Z, Ma X, Liang S, Xing W, Jiang T, Wang Y. Effects of two in-office bleaching agents with different pH on the structure of human enamel: an in situ and in vitro study. Oper Dent 2012; 38:100-10. [PMID: 22917440 DOI: 10.2341/11-173-l] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study evaluated the effects of two in-office bleaching agents (Beyond and Opalescence Boost) with different pH on the structure and mechanical properties of human enamel in vitro and in situ. One hundred and eight enamel slabs were obtained from freshly extracted premolars. The specimens were randomly distributed into nine groups (n=12), and the human saliva (HS) in the volunteers' oral cavities was used to simulate the in situ condition: Beyond + HS, Opalescence Boost (O-Boost) + HS, Control + HS, Beyond + artificial saliva (AS), O-Boost + AS, Control + AS, Beyond + distilled water (DW), O-Boost + DW, and Control + DW. The bleaching treatments were performed on the first and eighth day, and the total bleaching time was 90 minutes. Baseline and final surface roughness (RMS), surface morphology, microhardness, and fracture toughness (FT) were measured before the treatment and on the fifteenth day, respectively. Compared with control groups, surface alterations on enamel were found in the Beyond + AS and Beyond + DW groups under atomic force microscopy evaluation. Two-way analysis of variance and Tukey test revealed that the RMS showed significant intergroup differences for both storage condition and bleaching agent, whereas microhardness and FT revealed no significant alteration. The results indicated that in-office bleaching agents with low pH values could induce enamel morphology alterations under in vitro conditions. The presence of natural HS could eliminate the demineralization effect caused by low pH.
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Ma X, James B, Zhang L, Emanuelsson-Patterson EAC. The stretchability of Mozzarella cheese evaluated by a temperature-controlled 3-prong hook test. J Dairy Sci 2012; 95:5561-8. [PMID: 22901484 DOI: 10.3168/jds.2012-5486] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Accepted: 06/21/2012] [Indexed: 11/19/2022]
Abstract
Stretchability is one of the most important functional properties of Mozzarella cheese, but no objective and widely accepted technique exists for evaluation; most of the cheese stretchability tests are influenced by the ambient conditions. This paper demonstrates a technique, which is novel and relatively simple, to evaluate the stretchability of Mozzarella cheese objectively. In an oil bath, melted cheese is stretched by a hook probe, controlled by an Instron tensile tester (Instron Corp., Norwood, MA); cheese strands are lifted from the melted cheese reservoir to a stretch length of 300 mm, when the load and extension data are recorded by the Instron tensile tester. This test overcomes other tests' drawbacks, such as subjective stretching speeds and variations in ambient temperature and humidity. Through the test comparison on standard Mozzarella, the modified stretching test in an oil bath has greater repeatability than the original test without oil bath. From the load and extension curve, the yield load is measured to evaluate the stretchability. In the meantime, the inversion point extension of necking is also measured based on polymer study, producing more repeatable results than the yield load. The modified 3-prong hook test was applied to Mozzarella cheese samples with different processing conditions, including the screw conditions (screw time, speed, and temperature), draining pH, calcium content, and fat content, and significant differences were found between these samples and the control sample.
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518
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Ma X, Chen SY, Bai SQ, Zhang XQ, Li DX, Zhang CB, Yan JJ. RAPD analysis of genetic diversity and population structure of Elymus sibiricus (Poaceae) native to the southeastern Qinghai-Tibet Plateau, China. GENETICS AND MOLECULAR RESEARCH 2012; 11:2708-18. [PMID: 22843072 DOI: 10.4238/2012.june.27.5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Genetic diversity of Elymus sibiricus (Poaceae) was examined in eight populations from the southeast Qinghai-Tibet Plateau. We detected 291 RAPD polymorphic loci in 93 samples. The percentage of polymorphic bands (PPB) was 79%. Genetic diversity (H(E)) was 0.264, effective number of alleles (N(E)) was 1.444, Shannon's information index (H(O)) was 0.398, and expected Bayesian heterozygosity (H(B)) was 0.371. At the population level, PPB = 51%, N(E) = 1.306, H(E) = 0.176, I = 0.263, and H(B) = 0.247. A high level of genetic differentiation was detected based on Nei's genetic diversity analysis (G(ST) = 32.0%), Shannon's index analysis (33.7%), and the Bayesian method (θ(B) = 33.5%). The partitioning of molecular variance by AMOVA demonstrated significant genetic differentiation within populations (60%) and among populations (40%). The average number of individuals exchanged between populations per generation (N(m)) was 1.06. The populations were found to share high levels of genetic identity. No significant correlation was found between geographic distance and pairwise genetic distance (r = 0.7539, P = 0.9996). Correlation analysis revealed a significant correlation (r = 0.762) between RAPD H(E) found in this study and ISSR H(E) values from a previous study.
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519
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Xu S, Chaluvadi H, Ren X, Pflüger T, Senftleben A, Ning CG, Yan S, Zhang P, Yang J, Ma X, Ullrich J, Madison DH, Dorn A. Low energy (e, 2e) study from the 1t2 orbital of CH4. J Chem Phys 2012; 137:024301. [DOI: 10.1063/1.4732539] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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520
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Li M, Chen Z, Deng W, He Z, Wang Q, Jiang L, Ma X, Wang Y, Chua SE, Cheung C, McAlonan GM, Sham PC, Collier DA, Gong Q, Li T. Volume increases in putamen associated with positive symptom reduction in previously drug-naive schizophrenia after 6 weeks antipsychotic treatment. Psychol Med 2012; 42:1475-1483. [PMID: 22030695 DOI: 10.1017/s0033291711002157] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Brain structure appears to alter after antipsychotic administration, but it is unknown whether these alterations are associated with improvement of psychopathology in patients with schizophrenia. In this study, the authors explore this relationship. METHOD Altogether, 66 first-episode, drug-naive patients with schizophrenia and 23 well-matched healthy controls underwent brain magnetic resonance imaging scans at baseline. All 23 healthy controls and 42 of the patients were rescanned after 6 weeks follow-up. The patients received regular antipsychotic treatment during the 6-week period and their psychopathology was assessed using the Positive and Negative Syndrome Scale (PANSS) at baseline and 6 weeks. The difference in PANSS scores between baseline and 6 weeks was expressed as a ratio of the scores at baseline - 'PANSS reduction ratio'. A modified tensor-based morphometry procedure was applied to analyse longitudinal images. Correlations between regional volume changes, PANSS reduction ratio and antipsychotic drug dosages were explored. RESULTS Compared with healthy controls, there was a significant increase in grey-matter volume of the right putamen in patients after 6 weeks treatment. This volume change was positively correlated with a positive PANSS reduction score but not related to drug dosages. CONCLUSIONS Putaminal volume increased after 6 weeks antipsychotic treatment in first-episode schizophrenia. The increased volume was closely correlated with improved psychopathology, suggesting the putamen might be a biomarker to predict the treatment response in schizophrenia.
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521
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Xu S, Ma X, Yan S, Zhang P. Comment on “Dynamical (e, 2e) studies using tetrahydrofuran as a DNA analog” [J. Chem. Phys. 133, 124302 (2010)]. J Chem Phys 2012; 136:237101. [DOI: 10.1063/1.4729370] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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522
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Mu D, Huang R, Li S, Ma X, Lou C, Kuang A. Combining transfer of TTF-1 and Pax-8 gene: a potential strategy to promote radioiodine therapy of thyroid carcinoma. Cancer Gene Ther 2012; 19:402-11. [PMID: 22498723 DOI: 10.1038/cgt.2012.13] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Cotransfer of thyroid-specific transcription factor (TTF)-1 and Pax-8 gene to tumor cells, resulting in the re-expression of iodide metabolism-associated proteins, such as sodium iodide symporter (NIS), thyroglobulin (Tg), thyroperoxidase (TPO), offers the possibility of radioiodine therapy to non-iodide-concentrating tumor because the expression of iodide metabolism-associated proteins in thyroid are mediated by the thyroid transcription factor TTF-1 and Pax-8. The human TTF-1 and Pax-8 gene were transducted into the human thyroid carcinoma (K1 and F133) cells by the recombinant adenovirus, AdTTF-1 and AdPax-8. Re-expression of NIS mRNA and protein, but not TPO and Tg mRNA and protein, was detected in AdTTF-1-infected F133 cells, following with increasing radioiodine uptake (6.1-7.4 times), scarcely iodide organification and rapid iodide efflux (t(1/2) ≈ 8-min in vitro, t(1/2) ≈ 4.7-h in vivo). On contrast, all of the re-expression of NIS, TPO and Tg mRNA and proteins were detected in F133 cells coinfected with AdTTF-1 and AdPax-8. AdTTF-1- and AdPax-8-coinfected K1 and F133 cells could effectively accumulate radioiodine (6.6-7.5 times) and obviously retarded radioiodine retention (t(1/2) ≈ 25-30-min in vitro, t(1/2) ≈ 12-h in vivo) (P<0.05). Accordingly, the effect of radioiodine therapy of TTF-1 and Pax-8 cotransducted K1 and F133 cells (21-25% survival rate in vitro) was better than that of TTF-1-transducted cells (40% survival rate in vitro) (P<0.05). These results indicate that single TTF-1 gene transfer may have limited efficacy of radioiodine therapy because of rapid radioiodine efflux. The cotransduction of TTF-1 and Pax-8 gene, with resulting NIS-mediated radioiodine accumulation and TPO and Tg-mediated radioiodine organification and intracellular retention, may lead to effective radioiodine therapy of thyroid carcinoma.
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Zhang EY, Xiong J, Parker BL, Chen AY, Fields PE, Ma X, Qiu J, Yankee TM. Depletion and recovery of lymphoid subsets following morphine administration. Br J Pharmacol 2012; 164:1829-44. [PMID: 21557737 DOI: 10.1111/j.1476-5381.2011.01475.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Opioid use and abuse has been linked to significant immunosuppression, which has been attributed, in part, to drug-induced depletion of lymphocytes. We sought to define the mechanisms by which lymphocyte populations are depleted and recover following morphine treatment in mice. EXPERIMENTAL APPROACH Mice were implanted with morphine pellets and B- and T-cell subsets in the bone marrow, thymus, spleen and lymph nodes were analysed at various time points. We also examined the effects of morphine on T-cell development using an ex vivo assay. KEY RESULTS The lymphocyte populations most susceptible to morphine-induced depletion were the precursor cells undergoing selection. As the lymphocytes recovered, more lymphocyte precursors proliferated than in control mice. In addition, peripheral T-cells displayed evidence that they had undergone homeostatic proliferation during the recovery phase of the experiments. CONCLUSIONS AND IMPLICATIONS The recovery of lymphocytes following morphine-induced depletion occurred in the presence of morphine and via increased proliferation of lymphoid precursors and homeostatic proliferation of T-cells.
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Li X, Wang H, Jing H, Wang Y, Yu C, Wang J, Liu Z, Graviss EA, Ma X. Population-based surveillance of extensively drug-resistant tuberculosis in Shandong Province, China. Int J Tuberc Lung Dis 2012; 16:612-4. [PMID: 22410186 DOI: 10.5588/ijtld.11.0507] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
To investigate the prevalence of extensively drug-resistant tuberculosis (XDR-TB) in Chinese populations, we analyzed the drug resistance profiles of 1787 Mycobacterium tuberculosis isolates through a population-based surveillance project in Shandong Province, China. We found 330 (18.5%; 95%CI 16.1-20.3) isolates resistant to ≥1 first-line drug and 65 (3.6%; 95%CI 2.9-4.6) multidrug-resistant (MDR) isolates, of which 13 (20.0%; 95%CI 11.9-31.4) were XDR; 47/65 MDR-TB isolates (70.8%; 95%CI 58.2-81.4) were resistant to fluoroquinolones. Our results indicate that inadequate application of second-line anti-tuberculosis drugs has caused increased prevalence of XDR-TB in certain Chinese populations.
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Zhang H, Bai W, Qin L, Ma X. 171 EFFECTS OF BLACK COHOSH AND ESTROGEN ON THE HYPOTHALAMIC NUCLEI OF THE OVARIECTOMIZED RATS AT DIFFERENT TEMPERATURES. Maturitas 2012. [DOI: 10.1016/s0378-5122(12)70282-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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