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Phillips AA, Matin N, Frias B, Zheng MMZ, Jia M, West C, Dorrance AM, Laher I, Krassioukov AV. Rigid and remodelled: cerebrovascular structure and function after experimental high-thoracic spinal cord transection. J Physiol 2016; 594:1677-88. [PMID: 26634420 DOI: 10.1113/jp270925] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 11/18/2015] [Indexed: 12/25/2022] Open
Abstract
High-thoracic or cervical spinal cord injury (SCI) is associated with several critical clinical conditions related to impaired cerebrovascular health, including: 300-400% increased risk of stroke, cognitive decline and diminished cerebral blood flow regulation. The purpose of this study was to examine the influence of high-thoracic (T3 spinal segment) SCI on cerebrovascular structure and function, as well as molecular markers of profibrosis. Seven weeks after complete T3 spinal cord transection (T3-SCI, n = 15) or sham injury (Sham, n = 10), rats were sacrificed for either middle cerebral artery (MCA) structure and function assessments via ex vivo pressure myography, or immunohistochemical analyses. Myogenic tone was unchanged, but over a range of transmural pressures, inward remodelling occurred after T3-SCI with a 40% reduction in distensibility (both P < 0.05), and a 33% reduction in vasoconstrictive reactivity to 5-HT trending toward significance (P = 0.09). After T3-SCI, the MCA had more collagen I (42%), collagen III (24%), transforming growth factor β (47%) and angiotensin II receptor type 2 (132%), 27% less elastin as well as concurrent increased wall thickness and reduced lumen diameter (all P < 0.05). Sympathetic innervation (tyrosine hydroxylase-positive axon density) and endothelium-dependent dilatation (carbachol) of the MCA were not different between groups. This study demonstrates profibrosis and hypertrophic inward remodelling within the largest cerebral artery after high-thoracic SCI, leading to increased stiffness and possibly impaired reactivity. These deleterious adaptations would substantially undermine the capacity for regulation of cerebral blood flow and probably underlie several cerebrovascular clinical conditions in the SCI population.
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Jia M, Di W, Liu Y, Shi Y, Xie Y. ROS-INDUCED OXIDATIVE STRESS IN NOBILE-TYPE DENDROBIUM PROTOCORM-LIKE BODIES (PLBS) DURING VITRIFICATION. CRYO LETTERS 2016; 37:253-263. [PMID: 27925008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
BACKGROUND Oxidative stress involved in cryopreservation protocols may be responsible for the poor survival of tissues after cryopreservation. OBJECTIVE In the current study, we aimed to clarify the role of oxidative stress and its relationship with survival rate during cryopreservation of PLBs from nobile-type Dendrobium. MATERIALS AND METHODS ROS, antioxidants and oxidative products and the survival rate in PLBs from Dendrobium Hamanal Lake Dream were determined during vitrification. RESULTS Relative survival of PLBs decreased significantly after preculture and rewarming (P<0.01). Generation of ·O2- and protein carbonyl (PCO) increased significantly after preculture. Dramatic increases in ·O2-, H2O2 and MDA, and significant decreases in AsA content, activities of SOD and CAT were observed after rewarming. CONCLUSION ROS-induced oxidative stress was associated with the poor survival of PLBs following vitrification. ·O2- was the predominant ROS resulting in the decreased survival after preculture, while H2O2 together with ·O2- appear to be responsible for the survival decrease after rewarming.
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Ding Y, Duan S, Wu Z, Ye R, Yang Y, Yao S, Wang J, Xiang L, Jiang Y, Lu L, Jia M, Detels R, He N. Timing of antiretroviral therapy initiation after diagnosis of recent human immunodeficiency virus infection and CD4(+) T-cell recovery. Clin Microbiol Infect 2015; 22:290.e5-8. [PMID: 26627338 DOI: 10.1016/j.cmi.2015.11.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 10/09/2015] [Accepted: 11/15/2015] [Indexed: 10/22/2022]
Abstract
We retrospectively examined the timing of antiretroviral therapy (ART) initiation and CD4(+) T-cell recovery over 36 months among recent human immunodeficiency virus (HIV) infections using BED (HIV-1 subtypes B, E and D) immunoglobulin G capture enzyme immunoassay (BED-CEIA). Regardless of baseline CD4(+) counts, individuals (n = 393) who initiated ART >2 months after diagnosis had significantly decreased probability and rate of achieving CD4(+) counts ≥900 cells/μL or ≥600 cells/μL than those individuals (n = 135) who started ART earlier (≤2 months). But the mean CD4(+) counts in two groups converged after 30 months of treatment. Early ART initiation leads to accelerated CD4(+) recovery, but does not offer a long-term advantage in CD4(+) counts.
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Li ZB, Li ZZ, Li L, Chu HT, Jia M. MiR-21 and miR-183 can simultaneously target SOCS6 and modulate growth and invasion of hepatocellular carcinoma (HCC) cells. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2015; 19:3208-3217. [PMID: 26400524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE Both miR-21 and miR-183 are upregulated in hepatocellular carcinoma (HCC) and are considered as oncomiR. However, their oncogenic roles are still not fully understood. This study aimed to explore the regulative role of miR-21 and miR-183 over suppressors of cytokine signaling 6 (SOCS6), a negative regulator of cytokine receptor signaling. MATERIALS AND METHODS qRT-PCR analysis was performed to assess miR-21 and miR-183 expression in tumor tissues obtained from HCC patients and in HCC cell lines HepG2 and Hep3B. Their regulation over SOCS6 is verified using dual luciferase assay and Western blot analysis. The function of miR-21/miR-183-SOCS6 axis in cell growth, invasion and apoptosis was studied. RESULTS MiR-21 and miR-183 expression in HCC tissues than in adjacent normal tissues. Knockdown of miR-21 and miR-183 in HepG2 and Hep3B cells could decrease cell viability, increase cell apoptosis and decrease cell invasion. Based on the dual luciferase assay and Western blot analysis, we confirmed that both miR-21 and miR-183 can simultaneously target SOCS6 and modulate its expression at protein level. Overexpression of SOCS6 without 3'UTR could significantly lower cell growth rate and invasion capability, but increase relative caspase 3/7 activity and the ratio of apoptotic cells. However, these effects could not be blocked by miR-21 or miR-183 mimics. CONCLUSIONS This study revealed a novel miR-21/miR-183-SOCS6 axis that might play an important role in modulating cell growth and invasion of HCC cells.
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Yan W, Sun TY, Yang CM, Jia M, Li J, Tang HL, Zhou YF. CpG ODN 1826 enhances radiosensitivity of the human lung cancer cell line A549 in a rat model. GENETICS AND MOLECULAR RESEARCH 2015; 14:9804-12. [PMID: 26345913 DOI: 10.4238/2015.august.19.13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This study investigated the effects of CpG ODN1826 plus radiotherapy (RT) on tumor growth and angiogenesis of subcutaneous tumor in a rat model. Four treatment groups were tested in which rats were injected with 100 μL CpG ODN1826 (1 μg/μL) or 100 μL vehicle, with and without exposure to 8 Gy after 2 h. At 7 days after inoculation of lung cancer cells, drugs were injected in the tumor and radiation was administered over 5 days, after which the rate of tumor inhibition was calculated. Expression of VEGF-C in tumor tissue was seen in 10, 50, 80, and 100% of tumors in the CpG ODN1826 + RT, CpG ODN1826, vehicle + RT, and vehicle alone groups, respectively, while positive expression of NRP-1 was seen in 10, 40, 90, and 100% of tumors. The decreases in expression of VEGF-C mRNA in the CpG ODN1826 + RT and CpG ODN1826 groups compared with the NS + RT and NS groups were significant (P < 0.01), as were the decreases in NRP-1 mRNA in the CpG ODN1826 + RT group compared with the CpG ODN1826 group (P < 0.01). Thus, CpG ODN1826 can significantly inhibit tumor growth in a rat model, the mechanism of which may be related to inhibition of the expression of VEGF-C and NRP-1, which have an inhibitory effect on angiogenesis.
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Li P, Pan GP, Jia M, Wang QQ, Guo ZG, Zhao FR, Lei GL, Wan GR, Wan GM. Effect of Xin Mai Jia on atherosclerosis in rats. GENETICS AND MOLECULAR RESEARCH 2015; 14:6018-27. [PMID: 26125801 DOI: 10.4238/2015.june.1.19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We investigated the therapeutic effect of Xin Mai Jia (XMJ) on atherosclerosis (AS) in rats. Rat models of AS were established by peritoneally injecting vitamin D, feeding a high-fat diet, and inducing balloon injuries in rats. The stomachs of the rats were irrigated continuously for 10 weeks with XMJ. Blood lipid- and hemorheology-related indices of blood samples were detected. Pathological changes in the right common carotid arterial tissues were also determined. The protein expression levels of endothelial nitric oxide synthase, angio-tensin-1, and endothelin-1 were determined by western blotting. XMJ reduced cholesterol, trigylecride, and low-density lipoprotein levels as well as blood viscosity, sedimentation, and hematocrit. Furthermore, XMJ alleviated vascular endothelial injury and reduced/eliminated atherosclerotic plaques. In contrast, XMJ significantly increased the endothelium-dependent relaxing response of the AS rat models. The western blotting results showed that XMJ upregulated endothelial nitric oxide synthase but downregulated angiotensin-1 and endothelin-1. XMJ prevented the development of AS by regulating blood lipid levels, hemorheology, and vascular function.
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Jia M, Zhao HZ, Shen HP, Cheng YP, Luo ZB, Li SS, Zhang JY, Tang YM. Overexpression of lymphoid enhancer-binding factor-1 (LEF1) is a novel favorable prognostic factor in childhood acute lymphoblastic leukemia. Int J Lab Hematol 2015; 37:631-40. [PMID: 25955539 DOI: 10.1111/ijlh.12375] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 03/26/2015] [Indexed: 12/23/2022]
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Li J, Tang HL, Chen Y, Fan Q, Shao YT, Jia M, Wang JC, Yang CM. Malondialdehyde and SOD-induced changes of gastric tissues in acute gastric mucosal injury under positive acceleration. GENETICS AND MOLECULAR RESEARCH 2015; 14:4361-8. [PMID: 25966209 DOI: 10.4238/2015.april.30.9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of this study was to investigate the impacts of positive acceleration (+Gz) on the gastric mucosal tissues in cases of acute gastric mucosal injury and to explore the role of oxygen free radicals. Thirty Sprague Dawley rats were randomly divided into the absolute ethanol control group (A group), absolute ethanol +5Gz group (B group), absolute ethanol +10Gz group (C group). Following centrifugation, the gastric tissues of each group were studied for the presence of gastric mucosal injuries and morphological changes. The concentrations of malondialdehyde (MDA) and superoxide dismutase (SOD) contents were simultaneously investigated. Degree of gastric mucosal injuries were as follows: C group (visually 49.080 ± 10.254, under light microscopy 9.400 ± 2.011) > B group (visually 23.654 ± 9.678, under light microscopy 5.000 ± 1.054) > A group (visually 11.410 ± 3.742, under light microscopy 3.800 ± 1.399). The gastric mucosal MDA content (0.376 ± 0.084 vs 0.235 ± 0.044) was significantly higher in the C group than in the A group, whereas the SOD content (8.852 ± 1.001 vs 10.694 ± 0.965) was lower than that in the A group. However, the MDA and SOD contents did not change much in the B group. Our results suggest that the +Gz exposure might aggravate the acute gastric mucosal injury, and changes in MDA and SOD contents in the gastric tissues indicated that the oxygen free radicals play an important role in this regard.
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Zhang XH, Liu YX, Jia M, Han JS, Zhao M, Ji SP, Li AM. Oridonin inhibits tumor growth in glioma by inducing cell cycle arrest and apoptosis. Cell Mol Biol (Noisy-le-grand) 2014; 60:29-36. [PMID: 25553351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 12/15/2014] [Indexed: 06/04/2023]
Abstract
Glioma is the most common malignant intracranial tumors. Despite newly developed therapies, these treatments mainly target oncogenic signals, and unfortunately, fail to provide enough survival benefit in both human patients and mouse xenograft models, especially the first-generation therapies. Oridonin is purified from the Chinese herb Rabdosia rubescens and considered to exert extensive anti-cancer effects on human tumorigenesis. In this study, we systemically investigated the role of Oridonin in tumor growth and the underlying mechanisms in human glioma. We found that Oridonin inhibited cell proliferations in a dose- and time-dependent manner in both glioma U87 and U251 cells. Moreover, these anti-cancer effects were also confirmed in a mouse model bearing glioma. Furthermore, cell cycle arrest in S phase was observed in Oridonin-mediated growth inhibition by flow cytometry. Cell cycle arrest in S phase led to eventual cell apoptosis, as revealed by Hoechst 33342 staining and annexin V/PI double-staining. The cell apoptosis might be accomplished through a mitochondrial manner. In all, we were the first to our knowledge to report that Oridonin could exert anti-cancer effects on tumor growth in human glioma by inducing cell cycle arrest and eventual cell apoptosis. The identification of Oridonin as a critical mediator of glioma growth may potentiate Oridonin as a novel therapeutic strategies in glioma treatments.
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Boutselakis C, Forbes SA, Gunasekaran P, Jia M, Beare D, Bindal N, Kok CY, Leung K, Minjie D, Shepherd R, Bamford S, Ward S, Cole C, Teague JW, Stratton M, Campbell P, McDermott U. Abstract 5326: COSMIC: Enhancing the world's knowledge of somatic mutations in human cancer. Cancer Res 2014. [DOI: 10.1158/1538-7445.am2014-5326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
COSMIC, the Catalogue Of Somatic Mutations In Cancer (http://cancer.sanger.ac.uk) is the world's largest and most comprehensive online resource for exploring the impact of somatic mutations in human cancer. Now running for over 10 years, the 67th release (Oct 2013) describes 1592109 mutations in 947213 tumour samples across 25606 genes. This information is curated manually from the scientific literature, and automatically from genome resequencing consortium data portals. Full curation of the scientific literature provides in-depth understanding of the impact that each gene has in human cancer, and this has been achieved for 127 point-mutated cancer genes, and 185 fusion gene pairs. Curated genes are selected from the Cancer Gene Census (http://cancer.sanger.ac.uk/census), a listing of all genes with substantial evidence implicating them in cancer promotion, currently numbering 513 and updated frequently.
The mutations discovered in the re-sequencing of over 8000 tumour genomes are now present in COSMIC (viewable in isolation from the genic curations, http://cancer.sanger.ac.uk/wgs). In addition, the Sanger has now fully exome sequenced 1015 common cancer cell lines, identifying 1146874 coding mutations annotated for functional significance, and this is available exclusively in COSMIC at (http://cancer.sanger.ac.uk/cell_lines). While COSMIC has focused on point mutations and gene fusions, many other mutation mechanisms cause oncogenesis and these are now being integrated. The 67th COSMIC release includes copy number mutations integrated into the database and major web page views. To allow easy graphical examination of this data, copy number information was reduced to ‘gain’ and ‘loss’ annotations for inclusion in histograms and tables, with much more precise detail available with a further click. Copy number data is available in detail for every gene in COSMIC, and also for every tissue. Exploring cancer via COSMIC’s Cancer Browser (http://cancer.sanger.ac.uk/cosmic/browse/tissue), results not just in a plot of the most mutated genes, but now also a circular genome plot summarizing the copy number gains and losses across all the samples from that tumour type, all explorable in more detail via clicks on the pictures.
As the genomic data increases in COSMIC, it is becoming more important to qualitatively annotate the information, indicating which is more important or significant to oncogenesis. We are now building systems to better highlight known or putative functional mutations, improving the signal-to-noise ratio of cancer genome resequencing.
Citation Format: C Boutselakis, S A. Forbes, P Gunasekaran, M Jia, D Beare, N Bindal, C Y. Kok, K Leung, D Minjie, R Shepherd, S Bamford, S Ward, C Cole, J W. Teague, M Stratton, P Campbell, U McDermott. COSMIC: Enhancing the world's knowledge of somatic mutations in human cancer. [abstract]. In: Proceedings of the 105th Annual Meeting of the American Association for Cancer Research; 2014 Apr 5-9; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2014;74(19 Suppl):Abstract nr 5326. doi:10.1158/1538-7445.AM2014-5326
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Xu J, Li B, Liu Q, Shi Y, Peng J, Jia M, Liu Y. Wide-scale pollen banking of ornamental plants through cryopreservation. CRYO LETTERS 2014; 35:312-319. [PMID: 25282499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Cryopreservation has been proved to be an efficient method for the long-term storage of pollen, based on our previous studies establishing cryo pollen banks for Camellia, Paeonia, and Prunus mume. OBJECTIVE In the present study, we aimed to extend and verify the applicability of the cryopreservation protocol for ornamental plants. MATERIALS AND METHODS 71 species or cultivars from 19 families were cryopreserved using the established protocol. RESULTS Pollen from 60 species or cultivars (85% of those experimented on) retained viability after 1 year's cryopreservation; of these, 36 (51% of the total investigated) retained a sufficiently high germination capability compared with fresh pollen to enable longer term cryopreservation. CONCLUSION This study confirms that wide-scale pollen banking of ornamental plants is feasible.
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Wang Z, Jia M, Zhao H, Cheng Y, Luo Z, Chen Y, Xu X, Tang Y. Prognostic impact of pretransplantation hyperferritinemia in adults undergoing allogeneic hematopoietic SCT: a meta-analysis. Bone Marrow Transplant 2014; 49:1339-40. [DOI: 10.1038/bmt.2014.127] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Wang Q, Zhang R, Jia M, Luo L, Lin M, Zhou C. Serum beta-subunit human chorionic gonadotropin (β-HCG) value could predict in vitro fertilization (IVF) pregnancy outcomes on the 10th day after oocytes retrieval. Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wang Y, Mao Z, Jia M. Feature-Points-Based Multimodel Single Dynamic Kernel Principle Component Analysis (M-SDKPCA) Modeling and Online Monitoring Strategy for Uneven-Length Batch Processes. Ind Eng Chem Res 2013. [DOI: 10.1021/ie303091r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jia M, Li D, He X, Zhao Y, Peng H, Ma P, Hong K, Liang H, Shao Y. Impaired natural killer cell-induced antibody-dependent cell-mediated cytotoxicity is associated with human immunodeficiency virus-1 disease progression. Clin Exp Immunol 2013. [PMID: 23199330 DOI: 10.1111/j.1365-2249.2012.04672.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
This study evaluates the correlation between natural killer (NK) cell function and human immunodeficiency virus (HIV)-1 disease progression in 133 untreated HIV-1 positive Chinese subjects, including 41 former plasma donors (FPDs) and 92 men who have sex with men, and 35 HIV-negative controls. Flow cytometry was used to determine the abundance of NK cell subsets, the expression levels of receptor species, human leucocyte antigen (HLA) genotyping and the antibody-dependent cell-mediated cytotoxicity (ADCC) responses of NK cells. We observed a decreased expression of CD56(dim) CD16(+) NK cell subsets and an increased expression of CD56(-) CD16(+) with HIV-1 infection. As well, the expression of activating and inhibitory receptors increased significantly in NK cells, but CD16 receptor levels and the NKG2A/NKG2C ratio were down-regulated with HIV-1 infection. ADCC responses were higher in elite controllers than in all other groups, and were correlated inversely with HIV-1 viral load but correlated positively with CD4 count only in FPDs. Furthermore, individuals infected for < 1 year have lower ADCC responses than those infected for > 1 year. We also observed a negative association between ADCC responses and viral load in those who carry the HLA-A*30/B*13/Cw*06 haplotype. The positive correlation between CD16 expression and ADCC responses and a negative correlation trend between CD158a and ADCC responses were also observed (P = 0·058). Our results showed that the ADCC response is associated with patients' disease status, receptor expression levels, infection time and specific HLA alleles, which indicates that ADCC may offer protective effects against HIV-1 infection.
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Huang S, Jia M, Xie Y, Wang J, Xu W, Fang H. The progress of selective fluorescent chemosensors by boronic acid. Curr Med Chem 2012; 19:2621-37. [PMID: 22506769 DOI: 10.2174/092986712800493066] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 03/07/2012] [Accepted: 03/09/2012] [Indexed: 11/22/2022]
Abstract
As a cutting-edge scientific research field, the detection of biological active substance is very important for the prevention, diagnosis and treatment of diseases. Boronic acid interacts with cis-1,2-or 1,3-diol to form five- or six-membered ring which could be used as the reporter of fluorescent sensors to probe carbohydrates and bioactive substance. This review summarizes the recent progress of boronic acid sensors for carbohydrates, L-dopamine, fluoride, copper ion, mercury ion and hydrogen peroxide. In this article, we will briefly introduce the chemistry of boronic acid, and then give a description of the fluorescence properties of each boronic acid sensor, such as fluorescence intensity change, excitation and emission wavelengths, quantum yields and water solubility. In addition, we summarize the mechanisms of fluorescent signal output for some representative sensors and discuss the strategies for developing new fluorescent probes.
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Hao J, Hong K, Chen J, Jia M, Ruan Y, Shao Y. Human leukocyte antigen class I supertypes and viral control in HIV-1 infected former plasma donors from China. Retrovirology 2012. [PMCID: PMC3441586 DOI: 10.1186/1742-4690-9-s2-p167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Liu Z, Hong K, Jia M, Hao J, Gao Z, Liu S, Ruan Y, Xing H, Shao Y. Highly expression of Tim-3 on HIV-specific T cells associated with disease progression and T-cell exhaustion in HIV-1 infected Chinese. Retrovirology 2012. [PMCID: PMC3442026 DOI: 10.1186/1742-4690-9-s2-p270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
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Xiong N, Jia M, Chen C, Xiong J, Zhang Z, Huang J, Hou L, Yang H, Cao X, Liang Z, Sun S, Lin Z, Wang T. Potential autophagy enhancers attenuate rotenone-induced toxicity in SH-SY5Y. Neuroscience 2011; 199:292-302. [PMID: 22056603 DOI: 10.1016/j.neuroscience.2011.10.031] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 10/16/2011] [Accepted: 10/17/2011] [Indexed: 12/11/2022]
Abstract
Recent studies have shown that autophagy upregulation may be a tractable therapeutic intervention for clearing the disease-causing proteins, including α-synuclein, ubiquitin, and other misfolded or aggregated proteins in Parkinson's disease (PD). In this study, we explored a novel pharmacotherapeutic approach to treating PD by utilizing potential autophagy enhancers valproic acid (VPA) and carbamazepine (CBZ). Pretreatment with VPA (3 mM) and CBZ (50 μM) along with positive control rapamycin (Rap, 0.2 μM) or lithium (LiCl, 10 mM) significantly enhanced cell viability, decreased rotenone-induced nuclear fragmentation and apoptosis, ameliorated the decrease in mitochondrial membrane potential, reduced reactive oxygen species generation in the human neuroblastoma SH-SY5Y cells. Specifically, the numbers of lysosomes and autophagic vacuolar organelles were increased and the microtubule-associated protein 1 light chain 3-II (LC3-II) expression was up-regulated by VPA, CBZ, Rap, and LiCl (53%, 31%, 72%, and 63%), suggesting that these agents activated autophagic pathways. Moreover, pretreatment with the autophagy inhibitor chloroquine (Chl, 10 μM) remarkably strengthened rotenone toxicity in these cells. Our results suggest that VPA and CBZ, the most commonly used anti-epilepsy and mood-stabilizing medications with low-risk and easy administration might be potential therapeutics for PD.
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Jia M, Souchelnytstkyi S. Comments on the cross-talk of TGFβ and EGF in cancer. Exp Oncol 2011; 33:170-173. [PMID: 21956473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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Li D, Chen J, Jia M, Hong K, Ruan Y, Liang H, Liu S, Zhang X, Zhao H, Peng H, Ma P, Shao Y. Loss of balance between T helper type 17 and regulatory T cells in chronic human immunodeficiency virus infection. Clin Exp Immunol 2011; 165:363-71. [PMID: 21707592 DOI: 10.1111/j.1365-2249.2011.04435.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The aim of this study is to characterize the changes of CD4(+) CD25(high) forkhead box P3 (FoxP3(+) ) regulatory T cells (T(reg) ), interleukin (IL)-17 secreting T helper type 17 (Th17) cell frequencies and the balance of these two subsets in a cohort of chronic human immunodeficiency virus type 1 (HIV-1)-infected patients in China. A total of 115 untreated chronic HIV-infected individuals and 32 healthy donors were recruited in this study. Peripheral blood mononuclear cells were isolated from ethylenediamine tetracetic acid (EDTA) anti-coagulated fresh whole blood and stained to characterize the frequencies of T(reg) and Th17. Of a total 115 patients, 42 individuals including 10 elite controllers were followed-up for more than 1 year, and changes of T(reg) and Th17 frequencies were analysed over time. The continuous loss of Th17 cells was accompanied by a concomitant rise in the frequency of T(reg) cells, resulting in a loss of Th17/T(reg) balance during the progressive HIV infection. Meanwhile, the T(reg) levels, Th17 levels and Th17/T(reg) ratios of the elite controller group were comparable to those of the HIV-1 negative controls in the follow-up study. Additionally, we demonstrated that loss of balance between Th17 and T(reg) is associated with an earlier CD4 T cell decline during the course of HIV infection. Our results indicate that a loss of immune-balance of Th17 to T(reg) during HIV-1 disease progression and the persistence of such an immune-balance in the elite controllers may have a critical role in HIV-1 infection and further shed new light into understanding the pathogenesis of HIV-1.
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Huang J, Xiong N, Chen C, Xiong J, Jia M, Zhang Z, Cao X, Liang Z, Sun S, Lin Z, Wang T. Glyceraldehyde-3-phosphate dehydrogenase: activity inhibition and protein overexpression in rotenone models for Parkinson's disease. Neuroscience 2011; 192:598-608. [PMID: 21736921 DOI: 10.1016/j.neuroscience.2011.06.050] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 06/13/2011] [Accepted: 06/17/2011] [Indexed: 12/21/2022]
Abstract
Rotenone, a widely used pesticide and an environmental risk factor for Parkinson's disease (PD), induces nigrostriatal injury, Lewy body-like inclusions, and Parkinsonian symptoms in rat models for PD. Our previous data indicated that glyceraldehyde-3-phosphate dehydrogenase (GAPDH) overexpression and glycolytic inhibition were co-current in rotenone-induced PC12 (rat adrenal pheochromocytoma cells) cell death. However, whether GAPDH overexpression plays any role in dopaminergic neurodegeneration in vivo remains unknown. In this study, we have found that GAPDH overexpression and GAPDH-positive Lewy body-like aggregates in nigral dopaminergic neurons while nigral GAPDH glycolytic activity decreases in rotenone-based PD animal models. Furthermore, GAPDH knockdown reduces rotenone toxicity significantly in PC12. These in vitro and in vivo data suggest that GAPDH contributes to the pathogenesis of Parkinson's disease, possibly representing a new molecular target for neuroprotective strategies and alternative therapies for PD.
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73
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Jia M, Souchelnytskyi S. Kinase suppressor of Ras 2 is involved in regulation of cell proliferation and is up-regulated in human invasive ductal carcinomas of breast. Exp Oncol 2010; 32:209-212. [PMID: 21403620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM To study the expression of Kinase Suppressor of Ras 2 (KSR2) in human breast tumors and its effect on proliferation of breast epithelial cells. We reported previously that KSR2 was up-regulated in immortalized human breast epithelial cells. METHODS Proteomics technologies, systems biology tool for a KSR2 network analysis, immunoblotting, siRNA technology, overexpression of KSR2, cell proliferation assays and immunohistochemistry of tissue microarray of human breast tumors and normal breast tissue were used. RESULTS In conditionally immortalized primary epithelial cells KSR2 expression was shown to be up-regulated. The involvement of KSR2 in regulation of cell proliferation was predicted by a KSR2-centered network analysis. We observed that KSR2 down-regulation with specific siRNA inhibited cell proliferation. By immunohistochemistry of tissue microarray it was demonstrated that KSR2 expression was enhanced in human invasive breast carcinomas. CONCLUSION Our findings propose KSR2 as a new marker of immortalization, which has an impact on cell proliferation.
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Shao Y, Li T, Wolf H, Liu Y, Liu Y, Wang H, Zhu H, Lv W, Lin W, Chen J, Liang H, Hong K, Jia M. P14-15 LB. The safety and immunogenicity of HIV-1 vaccines based on DNA and replication competent vaccinia vector in phase I clinical trial. Retrovirology 2009. [PMCID: PMC2767920 DOI: 10.1186/1742-4690-6-s3-p404] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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75
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Li D, Chen J, Jia M, Hong K, Liu S, Zhang X, Zhao H, Peng H, Zhao Q, Ma P, Wu C, Shao Y. P16-14. Loss of balance between CD4+ regulatory T cell and Th17 population in chronic HIV infection. Retrovirology 2009. [PMCID: PMC2767741 DOI: 10.1186/1742-4690-6-s3-p243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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76
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Jia M, Chen J, Hong K, Liu S, Zhang X, Zhao H, Altfeld M, Walker B, Yu X, Shao Y. P16-12. Relative dominance of Gag-specific cytotoxic T lymphocytes is associated with viral load inversely in HIV-1 clade B' infected Chinese. Retrovirology 2009. [PMCID: PMC2767739 DOI: 10.1186/1742-4690-6-s3-p241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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77
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Wang H, Wang N, Bi A, Wang G, Ding G, Jia M, Lu L, Smith K. Application of cumulative odds logistic model on risk factors analysis for sexually transmitted infections among female sex workers in Kaiyuan city, Yunnan province, China. Sex Transm Infect 2009; 85:290-5. [PMID: 19158150 DOI: 10.1136/sti.2008.033100] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES To investigate the epidemiology of sexually transmitted infections (STI) among female sex workers (FSW) in Kaiyuan city, Yunnan province, China, and to identify risk factors associated with STI. METHODS A cross-sectional study of 737 FSW was carried out from March to May 2006, with confidential interviews and laboratory tests for STI. A cumulative logit model was used to evaluate the risk factors for STI. RESULTS The overall prevalence of HIV is 10.3%. The prevalence of syphilis, herpes simplex virus type 2, gonorrhoea, chlamydia and trichomonas was 7.5%, 68.1%, 8.3%, 25.9% and 10.6%, respectively. In multivariate cumulative odds logistic analysis, the factors associated with STI were education level, living in the entertainment location, injection drug use, non-injection drug use, over five clients in the previous week and inconsistent use of condoms with clients. CONCLUSION The findings highlight the gravity of the STI epidemic among FSW in China, where sexual transmission has now overtaken unsafe injection practices as the dominant mode of HIV transmission. Targeted intervention programmes for FSW should focus on increasing condom use, strengthening knowledge and awareness of STI/HIV and encouraging routine screening and treatment-seeking behaviours. Reducing the spread of STI also has profound implications for the prevention of HIV.
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Li C, Shen Y, Jia M, Sheng S, Adebajo MO, Zhu H. Catalytic combustion of formaldehyde on gold/iron-oxide catalysts. CATAL COMMUN 2008. [DOI: 10.1016/j.catcom.2007.06.020] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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79
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Li L, Lin C, Wu Z, Wu S, Rotheram-Borus MJ, Detels R, Jia M. Stigmatization and shame: consequences of caring for HIV/AIDS patients in China. AIDS Care 2007; 19:258-63. [PMID: 17364408 PMCID: PMC2795775 DOI: 10.1080/09540120600828473] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Using a representative sample of 478 doctors, nurses, and lab technicians working with people living with HIV/AIDS (PLWHA), a cross-sectional study was conducted to assess the impact of the AIDS epidemic on medical care systems and service providers in China. Correlation analyses showed significant association between internalized shame reported by service providers and their perception of being stigmatized due to working with PLWHA. Multivariate analyses revealed that the perceived level of institutional support for AIDS care was significantly related to the stigmatization and shame reported by the service providers. The study findings suggest that improved institutional support for AIDS care at the facility level and HIV-related stigma reduction intervention are crucial to maintain a high quality performance by the workforce in the health care system.
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Lou SY, Jia M, Tang XY, Huang F. Vortices, circumfluence, symmetry groups, and Darboux transformations of the (2+1) -dimensional Euler equation. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 75:056318. [PMID: 17677175 DOI: 10.1103/physreve.75.056318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2005] [Revised: 03/12/2007] [Indexed: 05/16/2023]
Abstract
The Euler equation (EE) is one of the basic equations in many physical fields such as fluids, plasmas, condensed matter, astrophysics, and oceanic and atmospheric dynamics. A symmetry group theorem of the (2+1) -dimensional EE is obtained via a simple direct method which is thus utilized to find exact analytical vortex and circumfluence solutions. A weak Darboux transformation theorem of the (2+1) -dimensional EE can be obtained for an arbitrary spectral parameter from the general symmetry group theorem. Possible applications of the vortex and circumfluence solutions to tropical cyclones, especially Hurricane Katrina 2005, are demonstrated.
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81
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Jia M, Xie L, Liu G, Wu T. Chuanxiong-type preparation for acute ischemic stroke. THE COCHRANE DATABASE OF SYSTEMATIC REVIEWS 2006. [DOI: 10.1002/14651858.cd005569] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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82
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Jia Y, Sun X, Jia M, Cui Z, Li C. One hundred and seven middle-aged and senile cases of coronary heart disease with ventricular premature beat treated by qing xin an shen fang. J TRADIT CHIN MED 2001; 21:247-51. [PMID: 12014120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
The therapeutic principle of clearing away the heart-heat to induce tranquilization was adopted in 107 middle-aged and senile patients with ventricular premature beat of coronary heart disease on the basis of pathogenic features of phlegm, heat, blood stasis and deficiency in this condition. Qing Xin An Shen Fang ([symbol: see text] a formula for clearing away the heart-heat to induce tranquilization) was used in the treatment group and compared with mexiletine and Fu Fang Dan Shen Tablets ([symbol: see text] Compound Salvia Tablets) used in the control group. The results turned to be that the markedly effective rate was 85.1% and the total effective rate 96.3% in the treated group, better than that in the control group, with the former having a good antihypertensive and antihyperlipemic effect and an effect of improving microcirculation and clinical symptoms.
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Li MX, Jia M, Jiang H, Dunlap V, Nelson PG. Opposing actions of protein kinase A and C mediate Hebbian synaptic plasticity. Nat Neurosci 2001; 4:871-2. [PMID: 11528415 DOI: 10.1038/nn0901-871] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A compartmental nerve-muscle tissue culture system expresses Hebbian activity-dependent synapse modulation. Protein kinase C (PKC) mediates a heterosynaptic loss of efficacy, and we now show that protein kinase A (PKA) is involved in homosynaptic stabilization. Both work through postsynaptic changes in the acetylcholine receptor (AChR) as measured electrophysiologically and by imaging techniques.
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84
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Yang Z, Wen A, Jia M, Mei Q, Jiang Y, Zhang S. [The effects of safflor yellow on microcirculation and hemorheology of acute blood stasis rats]. ZHONG YAO CAI = ZHONGYAOCAI = JOURNAL OF CHINESE MEDICINAL MATERIALS 2001; 24:283-4. [PMID: 12587163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To observe the effects of safflor yellow on microcirculation and hemorheology of acute blood stasis rats. METHODS The acute blood stasis medel was made by i.p. adrenalin (0.07 ml/(kg.time) for 2 times and the stimulation of ice-water. RESULTS Safflor could markedly improve the number of net dot in microcirculation, and eta b, eta p, eta f in hemorheology (P < 0.05). CONCLUSION Safflor yellow played an important role on blood stasis of rats.
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Jia M, Keutgen N, Matsuhashi S, Mitzuniwa C, Ito T, Fujimura T, Hashimoto S. Ion chromatographic analysis of selected free amino acids and cations to investigate the change of nitrogen metabolism by herbicide stress in soybean (glycine max). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2001; 49:276-80. [PMID: 11305252 DOI: 10.1021/jf990344c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A simple and reliable method for the determination of NH4+, K+, Na+, aspartic acid, asparagine, glutamine, and alanine by ion chromatography has been developed. It is suitable for monitoring changes of nitrogen metabolism in soybean because it can accurately measure concentrations o asparagine and NH4+, two key substances for nitrogen storage and transport in this plant species Analysis of asparagine distribution in soybean indicated that higher levels (up to 18.4 micromol g(-1) of fresh mass) occur in stems and lower levels in roots (2.0 micromol g(-1) of fresh mass) and leaves (1.6 micromol g(-1) of fresh mass). When the herbicide metsulfuron-methyl (0.5, 5, and 50 ppb) was applied via the nutrient solution to the root system, asparagine concentrations increased 3-6 times in stems roots, and leaves. Metsulfuron-methyl is known to impair the synthesis of branched amino acids and, in consequence, protein synthesis. Thus, nitrogen consumption was limited, leading to ar accumulation of asparagine. The possible use of this physiological response in agricultural practice to identify herbicide stress in soybean and to detect low-level residues of sulfonylurea herbicides ir the soil is discussed.
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Lanuza MA, Li MX, Jia M, Kim S, Davenport R, Dunlap V, Nelson PG. Protein kinase C-mediated changes in synaptic efficacy at the neuromuscular junction in vitro: the role of postsynaptic acetylcholine receptors. J Neurosci Res 2000; 61:616-25. [PMID: 10972958 DOI: 10.1002/1097-4547(20000915)61:6<616::aid-jnr5>3.0.co;2-n] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Activation of a mouse in vitro neuromuscular synapse produces a reduction in synaptic efficacy which is greater for nonactivated than for activated inputs to the myotubes. This has been shown to require thrombin and thrombin receptor activation and to involve a protein kinase C (PKC)-mediated step. We show in the present work that phorbol ester activation of PKC produces physiological loss of synapses in a time- and dose-related manner. We observe, using quantitative imaging methods, a parallel loss of acetylcholine receptors (AChR) from synaptically functional neurite-associated receptor aggregates in nerve-muscle cocultures. Biochemical measurements of total AChR show that PKC activation reduces both AChR stability (increases receptor loss) and receptor insertion into the surface membrane. Taken together, the data suggest that PKC activation decreases the stability of AChR aggregates in the muscle surface membrane. We conclude that PKC plays a crucial role in activity-dependent synapse reduction and does so, at least in part, by altering AChR stability.
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Davenport RW, Lanuza M, Kim S, Jia M, Snyder E, Nelson PG. Thrombin action decreases acetylcholine receptor aggregate number and stability in cultured mouse myotubes. BRAIN RESEARCH. DEVELOPMENTAL BRAIN RESEARCH 2000; 122:119-23. [PMID: 10960680 DOI: 10.1016/s0165-3806(00)00062-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Neurons develop and make very stable, long-term synaptic connections with other nerve cells and with muscle. Synaptic stability at the neuromuscular junction changes over development in that a proliferation of synaptic input are made to individual myotubes and synapses from all but one neuron are lost during development. In an established co-culture paradigm in which spinal motoneurons synaptically contact myotubes, thrombin and associated protease inhibitors have been shown to affect the loss of functional synaptic contacts [6]. Evidence has not been provided which clearly demonstrate whether protease/protease inhibitors affect either the pre- or postsynaptic terminal, or both. In an effort to determine whether these reagents directly affect postsynaptic receptors on myotubes, myotubes were cultured in the absence of neurons and the spontaneous presence and stability of aggregates of acetylcholine receptors (AChR) in control and thrombin-containing media were evaluated. In dishes fixed after treatment and in dishes in which individual aggregates were observed live, thrombin action appeared to increase loss of AChR aggregates over time. Hirudin, a specific inhibitor of the thrombin protease, diminished this loss. Neither reagent affected the overall incorporation or degradation of AChR; therefore, it appears these protease/protease inhibitors affect the state of AChR aggregation.
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Li N, Jia M, Yuan R. [Reconstruction of the mandible and soft tissue defects with the osteomyocutaneous free fibula flap]. ZHONGHUA ZHENG XING WAI KE ZA ZHI = ZHONGHUA ZHENGXING WAIKE ZAZHI = CHINESE JOURNAL OF PLASTIC SURGERY 2000; 16:20-1. [PMID: 11501021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
OBJECTIVE In order to ascertain a material that is ideal both for reconstruction of the composite mandibular defects and for osseointegrated implantation. METHODS Fifteen osteomyocutaneous fibula flaps were transferred for reconstruction of the mandible and surrounding soft tissues. The characters of the blood supply of the flap, the operation course, the relation of the fibula and dental implants were observed. RESULTS The osteomyocutaneous fibula flap was supplied by double vessels. The blood supply was reliable even after the fibula was cut into several segments. Periosteal circulation was its main blood supply. The postoperative contour and function of the mandibular region were good. The flap also favours dental implants and denture. CONCLUSION The osteomyocutaneous fibula flap was the ideal material to reconstruct the defects of mandible and surrounding soft tissues.
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Neale EA, Bowers LM, Jia M, Bateman KE, Williamson LC. Botulinum neurotoxin A blocks synaptic vesicle exocytosis but not endocytosis at the nerve terminal. J Cell Biol 1999; 147:1249-60. [PMID: 10601338 PMCID: PMC2168097 DOI: 10.1083/jcb.147.6.1249] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The supply of synaptic vesicles in the nerve terminal is maintained by a temporally linked balance of exo- and endocytosis. Tetanus and botulinum neurotoxins block neurotransmitter release by the enzymatic cleavage of proteins identified as critical for synaptic vesicle exocytosis. We show here that botulinum neurotoxin A is unique in that the toxin-induced block in exocytosis does not arrest vesicle membrane endocytosis. In the murine spinal cord, cell cultures exposed to botulinum neurotoxin A, neither K(+)-evoked neurotransmitter release nor synaptic currents can be detected, twice the ordinary number of synaptic vesicles are docked at the synaptic active zone, and its protein substrate is cleaved, which is similar to observations with tetanus and other botulinal neurotoxins. In marked contrast, K(+) depolarization, in the presence of Ca(2+), triggers the endocytosis of the vesicle membrane in botulinum neurotoxin A-blocked cultures as evidenced by FM1-43 staining of synaptic terminals and uptake of HRP into synaptic vesicles. These experiments are the first demonstration that botulinum neurotoxin A uncouples vesicle exo- from endocytosis, and provide evidence that Ca(2+) is required for synaptic vesicle membrane retrieval.
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Jia M, Li M, Liu XW, Jiang H, Nelson PG, Guroff G. Voltage-sensitive calcium currents are acutely increased by nerve growth factor in PC12 cells. J Neurophysiol 1999; 82:2847-52. [PMID: 10601423 DOI: 10.1152/jn.1999.82.6.2847] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Whole cell calcium currents were recorded from PC12 cells with the perforated patch technique. Currents were evoked by step depolarization from a holding potential of -90 mV. Nerve growth factor (NGF) increased calcium currents through L-type calcium channels by >75% within 3-5 min. This increase was inhibited by K-252a, by nifedipine, and by inhibition or down-regulation of kinase C. Brain-derived neurotrophic factor (BDNF) also increased calcium current, but to a smaller extent. Thus increases in calcium current can be linked to activation of either the high- or the low-affinity nerve growth factor receptor. Increases in presynaptic calcium uptake appear to be a crucial element in the short-term actions of the neurotrophins on neurotransmitter release leading to long-term potentiation. Also, the control of calcium uptake is likely to be an important factor in the long-term actions of the neurotrophins on neuronal survival and neuronal protection. The present data indicate that the PC12 cell may be a useful model for studying the effect of the neurotrophins on calcium uptake.
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Xiao FS, Zhang W, Jia M, Yu Y, Fang C, Tu G, Zheng S, Qiu S, Xu R. Higher activity of CuCl2/HZSM-5 prepared by dispersion method in selective catalytic reduction of NO by propylene (SCR-HC) at lower temperature. Catal Today 1999. [DOI: 10.1016/s0920-5861(98)00468-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Jia M, Li M, Dunlap V, Nelson PG. The thrombin receptor mediates functional activity-dependent neuromuscular synapse reduction via protein kinase C activation in vitro. JOURNAL OF NEUROBIOLOGY 1999; 38:369-81. [PMID: 10022579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Activity-dependent selective reduction of synaptic efficacy is expressed in an in vitro system involving mouse spinal cord and muscle cells. Thrombin or electrical stimulation of the innervating axons induces a decrease in neuromuscular synapse strength, and a specific thrombin inhibitor, hirudin, blocks the electrically evoked down-regulation of synapse effectiveness. We further demonstrate that a thrombin receptor-activating peptide (TRAP), SFLLRNPNDKYEPF, produces a decrement of synapse strength. Both TRAP and electrically evoked synapse decrement are prevented by the specific protein kinase C blocker calphostin C, and the TRAP-evoked synapse decrement is unaffected by a specific protein kinase A blocker, H-89. Thus, we propose that muscle activity, thrombin release, and thrombin receptor and PKC activation are initial steps in the process of the activity-dependent synapse reduction expressed in our system.
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Zeng N, Shen Y, Jia M, Zhang Y, Wei Y, Ma Y. [Experimental studies on antioxidative effect of tongcao and xiao-tongcao polysaccharides]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1999; 24:46-8, inside back cover. [PMID: 12078156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
OBJECTIVE To observe the antioxidative effect of four kinds of Tongcao and Xiao-Tongcao polysaccharides. METHOD Aged mice (nine months) were abdominal administrated with four kinds of polysaccharides (Tongtuomu, Ximashanjingjiehua, Xinanxiuqiu, Ditanghua) at dosages of 160 mg/kg and 80 mg/kg for 45 days. RESULT Four kinds of polysaccharides could obviously decrease the content of serum and liver lipoperoxide(LPO) as well as the content of lipofuscin(LF) in brain and cardiac muscle of aged mice, and also increase the activity of superoxide dismutase(SOD) of red cells in aged mice. CONCLUSION The polysaccharide components of Tongtuomu and three kinds of Xiao-Tongcao have antioxidative effect, suggesting that these substances have antiageing function.
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Wang G, Jia M, Zhao S, Li J. [A study on the relationship between lymphocyte micronucleus rates and blood plasma benzo(a)pyrene levels in coking workers]. ZHONGHUA YU FANG YI XUE ZA ZHI [CHINESE JOURNAL OF PREVENTIVE MEDICINE] 1999; 33:40-2. [PMID: 11864455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To study the relationship between lymphocyte micronucleus rates and blood plasma levels of benzo(a)pyrene [B(a)P] in coking workers. METHODS One hundred coking workers and 100 unexposed workers were selected, and their lymphocyte micronucleus rates and plasma levels, as well as workplace air concentrations, of B(a)P were determined. RESULTS It showed that there was significant difference in plasma B(a)P level between coking workers and unexposed workers, and it correlated with air concentration of B(a)P in the workplace. Positive rates of micronucleus and rates of micronucleus lymphocyte were 60% and 1.79per thousand in coking workers and 29% and 1.10per thousand in controls, respectively, with very significantly statistical difference. It also showed that positive micronucleus rate correlated with plasma level of B(a)P in dose-effect pattern. Multivariate analysis showed that factors contributing to positive micronucleus rate ranked in such an order: plasma level of B(a)P, economic status, regularity of their lifestyle and smoking status of the coking workers. CONCLUSION Accumulation of B(a)P in blood plasma played a major role in the formation of lymphocyte micronucleus. Results of micronucleus test in coking workers could reflect preliminary damage to their health caused by it.
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Shen Y, Zeng N, Liu J, Jia M, Zhang Y, Wei Y, Ma Y. [Preliminary studies on pharmacological actions of tongca and xiao-tongcao polysaccharides]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1998; 23:741-3, 765. [PMID: 12242826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
OBJECTIVE To study and compare the immunologic function and antioxidative effect of Tongcao(Tongtuomu) and Xiao-Tongcao(Ximashanjingjiehua, Xinanxiuqiu, Ditanghua) polysaccharides. METHOD Mice were abdominally administrated with four kinds of polysaccharides at dosages of 80 mg/kg and 40 mg/kg for 7-10 days. RESULT Four kinds of polysaccharides could increase the serum-lysozyme activity, phagocytic function of MPS and the serum hemolysin-antibody level in mice, inhibit the delayed hypersensitivity induced by DNCB in mice and raise the serum-catalase activity in mice. CONCLUSION Four kinds of Tongcao or Xiao-Tongcao polysaccharides have immunoregulative function and antioxidative effect. The results could enrich the contents of "A Study on Species-Sorting and Quality of Tongcao-Xiao-Tongcao Crude Drugs".
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Shen Y, Zeng N, Jia M, Zhang Y, Wei Y, Ma Y. [Experimental studies on anti-inflammatory, antipyretic and diuretic effects of several species of tongcao and xiao-tongcao]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1998; 23:687-90, 704-inside back cover. [PMID: 11599351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
OBJECTIVE To observe and compare the anti-inflammatory, antipyretic and diuretic effects of three kinds of Tongcao(Tongtuomu, Panyezhangyeshu and Luosan) and seven kinds of Xiao-tongcao(Ximashanjinjiehua, Xinanxiuqiu1. 2., Ditanghua, Suixuezhangcai, Qingjiaye and Zhongguo jinjiehua). METHOD Decoctions prepared from the above kinds of Tongcao and Xiao-tongcao crude drugs were given to rats at dosages of 8 g/kg and 4 g/kg by ig. Pharmacological actions were observed by means of carrageenan-induced swelling paws, fever models induced by beer-yeast or carrageenan and metabolic cage method in rats. RESULT All the experimental decoctions could inhibit carrageenan-induced swelling of rat paws in different degrees and exerted anti-pyretic effect on rat fever models induced by beer-yeast or carrageenan. Three kinds of Xiaotongcao(Ximashanjingjiehua, Xinanxiuqui2., Zhongguojinjiehua) had obvious diuretic effect on rats. CONCLUSION Decoctions of different species of Tongcao and Xiao-tongcao all have anti-inflammatory, antipyretic and diuretic effects, thus providing some pharmacologic basis for the efficacy assay, clinical application, species collation and quality study of Tongcao and Xiao-tongcao.
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Li N, Jia M, Yuan R. [The reconstruction of mandible and soft tissue defects with the osteocutaneous free fibula flap]. ZHONGHUA KOU QIANG YI XUE ZA ZHI = ZHONGHUA KOUQIANG YIXUE ZAZHI = CHINESE JOURNAL OF STOMATOLOGY 1998; 33:332-4. [PMID: 11774433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To find a new material to reconstruct the defects involving mandible and the surrounding soft tissues with the donor site morbidity mild and transient. METHODS Ten consecutive fibula free flaps were used to reconstruct composite defect of mandible and soft tissue. The average length of the fibular graft was 9.1 cm, and the average size of the cutaneous-flap was 4.5 cm x 6.2 cm. RESULTS 99mTcO4- scan demonstrated that 9 flaps were survivial (9/10) 2 weeks postsurgery. The function and the contour of the mandible were excellent. The donor site morbidity was mild and transient. CONCLUSION Fibula has a high density of cortical bone. There is enough bone available to reconstruct mandible defect. The osteocutaneous fibula flap is a new material to reconstruct the composite mandible and soft tissue defects.
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98
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Jia M, Wei Y, Ma Y, Shen Y, Zhang Y. [Survey of botanical origin of tongcao (medulla Tetrapanacis) and identification of its commercial products]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1997; 22:454-8, 510. [PMID: 11038909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Through the investigation on botanical origin, output and sales of Togcao in producing areas, it has been proved that there are twenty-two species of six families used as Tongcao. The medicinal parts are the pith of stems or petioles. The provinces featuring more species and larger output of Tongcao are Sichuan, Yunnan, Guizhou, Guangxi, Hunan and Shaanxi. A hundred and two pieces of commercial samples collected from twenty-six provinces in China, Hongkong area, Japan, Malaysia, Thailand, Singapore and Republic of Korea have been identified. The result shows that both Xiaotongcao and Datongcao are called by the same name Tongcao. The main species is Xiaotongcao, which takes a proportion of 70% in Tongcao. And the Tongcao(Tetrapanax papyriferus, taking a proportion of 20%) as recorded in the Chinese Pharmacopoeia (1995 edition) is seldom used.
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99
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Wu Z, Zhang J, Detels R, Li VC, Cheng H, Duan S, Li Z, Dong L, Huang S, Jia M, Bi X. Characteristics of risk-taking behaviors, HIV and AIDS knowledge, and risk perception among young males in southwest China. AIDS EDUCATION AND PREVENTION : OFFICIAL PUBLICATION OF THE INTERNATIONAL SOCIETY FOR AIDS EDUCATION 1997; 9:147-160. [PMID: 9167800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A cross-sectional survey was undertaken to describe risk-taking behaviors and to assess the knowledge and risk perception of HIV and AIDS among young males aged 18 to 29 years in 82 villages in Longchuan, Yunnan, China, in 1994. Information on demographic, behavioral, and drug-using factors, and knowledge of HIV transmission and prevention, and risk perception was collected using an interviewer-administered anonymous questionnaire. A total of 1,548 individuals were interviewed and 433 drug users, including 52 nonsharing injectors and 140 sharing injectors, were identified. Over half the individuals scored 0 on HIV knowledge, but knowledge was greater among nonsharing drug injectors. Most drug injectors had initiated drug injection after 1990. The reported incidence continues to increase in all three major ethnic groups. Sharing of equipment was common (73%) among injectors. Drug users were four times more likely to have had premarital or extramarital sex, but condoms were used by only 2.5%. Thus, factors promoting spreading of HIV are common in this area. We recommend that a community-based intervention program, targeting both young men and women, be implemented and evaluated in Longchuan as soon as possible.
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100
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Li Z, Jia M. [Pharmacognostic identification of the root bark of Broussonetia papyrifera, an adulterant of cortex mori]. ZHONG YAO CAI = ZHONGYAOCAI = JOURNAL OF CHINESE MEDICINAL MATERIALS 1997; 20:66-8. [PMID: 12572483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
The article reports the morphological characters, the histological structure, TLC and UV spectrum identification for the adulterant of Cortex Mori, the root bark of Broussonetia papyrifera. The results show that they can be distinguished each other.
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