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Wang W, Xia X, Wang S, Sima N, Li Y, Han Z, Gao Q, Luo A, Li K, Meng L, Zhou J, Wang C, Shen K, Ma D. Oncolytic adenovirus armed with human papillomavirus E2 gene in combination with radiation demonstrates synergistic enhancements of antitumor efficacy. Cancer Gene Ther 2011; 18:825-36. [DOI: 10.1038/cgt.2011.53] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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202
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Wang Y, Liu H, Zhang Y, Ma D. cDNA cloning and expression of an apoptosis-related gene, humanTFAR15 gene. ACTA ACUST UNITED AC 2011; 42:323-9. [PMID: 20229348 DOI: 10.1007/bf03183610] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/1998] [Indexed: 11/25/2022]
Abstract
By means of cDNA-RDA method, some cDNA fragments were found to have high levels of expression during deprivation of GM-CSF (granulocyte macrophage-colony stimulating factor) in a human myeloid cell line, TF-1 cells. One of these fragments was identified as a novel gene. To get the full length of cDNA, rapid amplification of cDNA ends (RACE) and expressed sequence tags (EST) overlapping fragments assembling strategies were used. The novel gene was named TRAF15 (TF-1 cell apoptosis related gene-15), which consists of 1 218 nucleotides and encodes 212 amino acids. The putative protein product of TFAR15 is partially homologous toC. elegans protein C14A4.11. TFAR15 mRNA is expressed in fetal liver, kidney, spleen and lung, and also in some human myeloid cell lines. Both of the TFAR15 mRNA and protein were highly expressed in TF-1 cells after GM-CSF withdrawal.In vitro analysis showed that the recombinant TFAR15 protein could inhibit the natural cell death of 293 cells, an embryonic kidney cell line.
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Affiliation(s)
- Y Wang
- Laboratory of Medical Immunology, Beijing Medical University, 100083, Beijing, China
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Wang X, Andrews L, Ma D, Gagliardi L, Gonçalves AP, Pereira CCL, Marçalo J, Godart C, Villeroy B. Infrared spectra and quantum chemical calculations of the uranium-carbon molecules UC, CUC, UCH, and U(CC)2. J Chem Phys 2011; 134:244313. [DOI: 10.1063/1.3602325] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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204
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Fidalgo AR, Cibelli M, White JPM, Nagy I, Noormohamed F, Benzonana L, Maze M, Ma D. Peripheral orthopaedic surgery down-regulates hippocampal brain-derived neurotrophic factor and impairs remote memory in mouse. Neuroscience 2011; 190:194-9. [PMID: 21699962 DOI: 10.1016/j.neuroscience.2011.05.073] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 05/25/2011] [Accepted: 05/30/2011] [Indexed: 12/22/2022]
Abstract
Peripheral orthopaedic surgery induces a profound inflammatory response. This includes a substantial increase in cytokines and, especially, in the level of interleukin (IL)-1β in the hippocampus, which has been shown to impair hippocampal-dependent memory in mice. We have employed two tests of contextual remote memory to demonstrate that the inflammatory response to surgical insult in mice also results in impairment of remote memory associated with prefrontal cortex (PFC). We have also found that, under the conditions presented in the social interaction test, peripheral orthopaedic surgery does not increase anxiety-like behaviour in our animal model. Although such surgery induces an increase in the level of IL-1β in the hippocampus, it fails to do so in the PFC. Peripheral orthopaedic surgery also results in a reduction in the level of hippocampal brain-derived neurotrophic factor (BDNF) and this may contribute, in part, to the memory impairment found after such surgery. Our data suggest that a reduction in the level of hippocampal BDNF and an increase in the level of hippocampal IL-1β following surgery may affect the transference of fear memory in the mouse brain.
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Affiliation(s)
- A R Fidalgo
- Anaesthesia, Pain Medicine and Intensive Care Section, Department of Surgery and Cancer, Chelsea and Westminster Hospital, Imperial College School of Medicine, 369 Fulham Road, London SW10 9NH, UK
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205
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Cattano D, Valleggi S, Cavazzana AO, Patel CB, Ma D, Giunta F. Xenon exposure in the neonatal rat brain: effects on genes that regulate apoptosis. Minerva Anestesiol 2011; 77:571-578. [PMID: 21617619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND In the developing rodent brain, exposure to volatile anesthetics causes widespread neuronal apoptosis in several regions of the brain. Increasing evidence points to a possible neuroprotective role for the anesthetic gas xenon, following neuronal injury. To address this gap in understanding, we explored the transcriptional consequences of xenon in the brains of postnatal day 7 (P7) rats exposed to xenon compared to those of air-breathing animals, with particular emphasis on the mRNA transcript levels of Akt and c-Jun N-terminal kinase kinase 1 (JNKK1), which are important for cell survival and the activation of extrinsic neuroapoptotic pathways, respectively. METHODS P7 Sprague/Dawley rats were exposed to air (75% nitrogen, 25% oxygen) or xenon (75% xenon, 25% oxygen) for 120 min (N=6/group). Forebrains were harvested for reverse transcription polymerase chain reaction, which enabled quantification of Akt and JNKK1 mRNA transcripts. Suppression subtractive hybridization was used to explore the "genetic signature" of xenon exposure. RESULTS Compared to control air-breathing animals, xenon-breathing rats exhibited a 0.7-fold decrease in Akt mRNA expression (P<0.01) and a 1.6-fold increase in JNKK1 mRNA levels (P<0.05). CONCLUSION The concomitant decrease in the Akt mRNA expression level and increase in the JNKK1 mRNA transcript level provide evidence that xenon has a neuroapoptotic effect in the developing rodent forebrain. Given these results, further study into the paradoxical neuroprotective and neuroapoptotic effects of xenon is warranted.
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Affiliation(s)
- D Cattano
- Department of Anesthesiology, University of Texas Medical School at Houston, Houston, TX 77054, USA.
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206
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Gisselbrecht C, Glass B, Laurent G, Gill DS, Linch MD, Trneny M, Bron D, Shpilberg O, Hagberg H, Bargetzi M, Ma D, Briere J, Moskowitz C, Schmitz N. Maintenance with rituximab after autologous stem cell transplantation in relapsed patients with CD20 diffuse large B-cell lymphoma (DLBCL): CORAL final analysis. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.8004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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207
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Ma D, Xu X, An S, Liu H, Yang X, Andersen JF, Wang Y, Tokumasu F, Ribeiro JMC, Francischetti IMB, Lai R. A novel family of RGD-containing disintegrins (Tablysin-15) from the salivary gland of the horsefly Tabanus yao targets αIIbβ3 or αVβ3 and inhibits platelet aggregation and angiogenesis. Thromb Haemost 2011; 105:1032-45. [PMID: 21475772 DOI: 10.1160/th11-01-0029] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Accepted: 02/08/2011] [Indexed: 11/05/2022]
Abstract
A novel family of RGD-containing molecules (Tablysin-15) has been molecularly characterised from the salivary gland of the haematophagous horsefly Tabanus yao. Tablysin-15 does not share primary sequence homology to any disintegrin discovered so far, and displays an RGD motif in the N-terminus of the molecule. It is also distinct from disintegrins from Viperidae since its mature form is not released from a metalloproteinase precursor. Tablysin-15 exhibits high affinity binding for platelet αIIbβ3 and endothelial cell αVβ3 integrins, but not for α5β1 or α2β1. Accordingly, it blocks endothelial cell adhesion to vitronectin (IC50 ~1 nM) and marginally to fibronectin (IC50 ~1 μM), but not to collagen. It also inhibits fibroblast growth factor (FGF)-induced endothelial cell proliferation, and attenuates tube formation in vitro. In platelets, Tablysin-15 inhibits aggregation induced by collagen, ADP and convulxin, and prevents static platelet adhesion to immobilised fibrinogen. In addition, solid-phase assays and flow cytometry demonstrates that αIIbβ3 binds to Tablysin-15. Moreover, immobilised Tablysin-15 supports platelet adhesion by a mechanism which was blocked by anti-integrin αIIbβ3 monoclonal antibody (e.g. abciximab) or by EDTA. Furthermore, Tablysin-15 dose-dependently attenuates thrombus formation to collagen under flow. Consistent with these findings, Tablysin-15 displays antithrombotic properties in vivo suggesting that it is a useful tool to block αIIbβ3, or as a prototype to develop antithrombotics. The RGD motif in the unique sequence of Tablysin-15 represents a novel template for studying the structure-function relationship of the disintegrin family of inhibitors.
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Affiliation(s)
- D Ma
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, Yunnan, China
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Fang Y, Kong B, Yang Q, Ma D, Qu X. The p53-HDM2 gene-gene polymorphism interaction is associated with the development of missed abortion. Hum Reprod 2011; 26:1252-8. [DOI: 10.1093/humrep/der017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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209
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Tian L, Li W, Wang J, Zhang Y, Zheng Y, Qi H, Guo X, Zhang Y, Ma D, Shen H, Wang Y. The CKLF1-C19 peptide attenuates allergic lung inflammation by inhibiting CCR3- and CCR4-mediated chemotaxis in a mouse model of asthma. Allergy 2011; 66:287-97. [PMID: 21208220 DOI: 10.1111/j.1398-9995.2010.02478.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Human chemokine-like factor 1 (CKLF1) is a functional ligand for human CCR4, which is highly expressed on Th2 lymphocytes and plays an important role in the pathogenesis of asthma. The expression and function of CKLF1 are associated with asthma. The CKLF1 C-terminal peptides C19 and C27 also interact with human CCR4. Albeit with weaker chemotactic activity, C19 can inhibit chemotaxis induced by both CKLF1 and CCL17. Here, we explore whether C19 can act as an antagonist in the development of asthma. METHODS A mouse model of asthma and in vitro and in vivo chemotaxis assays were used. RESULTS Using a mouse model of asthma, we demonstrate here that C19 reduces airway eosinophilia, lung inflammation and airway hyperresponsiveness; in contrast, C27 has little effect on these parameters. The inhibitory effects of C19 on CCR4-mediated chemotaxis could be observed in human Th2 lymphocytes and in the splenocytes from ovalbumin-sensitized mice. Furthermore, we show that C19 can inhibit CCL11-induced chemotaxis of mouse eosinophils and human CCR3-transfected or mouse Ccr3-transfected HEK293 cells. In vivo chemotaxis assays revealed that C19 and C27 can reduce CCL11-mediated recruitment of eosinophils into the peritoneal cavity and that this inhibitory effect is stronger for C19 than for C27. CONCLUSIONS Thus, C19 can attenuate airway eosinophilia and lung inflammation by inhibiting CCR3- and CCR4-mediated chemotaxis in a mouse model of asthma. Given its ability to inhibit human CCR3- and CCR4-meditated chemotaxis, C19 has great therapeutic potential for use in the treatment and control of allergic asthma.
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Affiliation(s)
- L Tian
- Department of Medical Immunology, School of Basic Medical Science, Peking University Health Science Center, #38 Xueyuan Road, Beijing, China
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210
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Ma D, Li Y, Dong J, An S, Wang Y, Liu C, Yang X, Yang H, Xu X, Lin D, Lai R. Purification and characterization of two new allergens from the salivary glands of the horsefly, Tabanus yao. Allergy 2011; 66:101-9. [PMID: 20608917 DOI: 10.1111/j.1398-9995.2010.02435.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Horsefly bite can cause allergic reactions in humans. There is no information about allergenic horsefly proteins. OBJECTIVES The current work aims to purify and characterize IgE-binding proteins from horsefly salivary glands. METHODS Two IgE-binding proteins, Tab a 1 and Tab a 2 with molecular weight of 26 and 35 kd, respectively, were purified and characterized from 60,000 pairs of horsefly salivary glands of Tabanus yao, respectively. Their primary sequences were determined by Edman degradation and cDNA cloning. Their allergenicity was examined using enzyme-linked immunosorbent assay (ELISA), ELISA inhibition tests, and immunoblots. RESULTS Immunoblotting demonstrated IgE binding by 32 and 34 of 37 (86.5% and 91.8%) subjects' sera to Tab a 1 and Tab a 2, respectively. They were identified as an antigen 5-related (Ag 5) protein and hyaluronidase, respectively. ELISA inhibitions of serum IgE reactivity to the horsefly salivary gland extract (SGE) using purified Tab a 1 and Tab a 2 were significant (about 45%). In addition, these proteins showed some IgE-binding capacity to sera of subjects with wasp sting allergy. CONCLUSIONS We have first identified and characterized two IgE-binding proteins, Tab a 1, an Ag 5-like protein and Tab a 2, a hyaluronidase, from the horsefly salivary glands. They appear to be of importance for the allergic reactions induced by horsefly bite. These allergens are thus not only found in stinging but also found in hematophagous insects. These results also provided support for the presence of the so-called wasp-horsefly syndrome (WHS).
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Affiliation(s)
- D Ma
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
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211
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Zhou ZW, Shu Y, Li M, Guo X, Pac-Soo C, Maze M, Ma D. The glutaminergic, GABAergic, dopaminergic but not cholinergic neurons are susceptible to anaesthesia-induced cell death in the rat developing brain. Neuroscience 2010; 174:64-70. [PMID: 21056635 DOI: 10.1016/j.neuroscience.2010.10.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2010] [Revised: 09/10/2010] [Accepted: 10/02/2010] [Indexed: 11/28/2022]
Abstract
Neuronal cell death induced by anaesthetics in the developing brain was evident in previous pre-clinical studies. However, the neuronal cell types involved in anaesthesia-induced neuronal cell death remains elusive. The aim of this study was to investigate glutamatergic, GABAergic, cholinergic and dopaminergic neuronal cell apoptosis induced by anaesthetic exposure in specific brain regions in rats. Separate cohorts of 7-day-old Sprague Dawley (SD) rat pups were randomly assigned to two groups: Naive and anaesthetics alone (70% nitrous oxide and 0.75% isoflurane exposure for 6 h). The brains were sectioned and the slices that contained the basal forebrain, substantia nigra, cornu ammonis area 1 (CA1) subarea of hippocampus or cingulate cortex were selected and subsequently subjected to double-labelled fluorescent immunohistochemistry for choline acetyltransferase, dopamine, vesicular glutamate transporter 1 (vGLUT1) or glutamic acid decarboxylase 67 (GAD67) together with caspase 3, respectively. Compared to the naive control, anaesthetic exposure significantly increased the number of caspase-3 positive cells in the CA1 subarea of hippocampus, cingulate cortex, and substantia nigra, but not in the basal forebrain. 54% and 14% of apoptotic cells in the CA1 subarea of hippocampus were GABAergic and glutamatergic neurons respectively. In the cingulate cortex, 30% and 37% of apoptotic cells were GABAergic and glutamatergic neurons respectively. In the substantia nigra, 22% of apoptotic cells were dopaminergic neurons. Our data suggests, anaesthetic exposure significantly increases neuroapoptosis of glutamatergic, GABAergic and dopaminergic neurons in the developing brain but not that of the cholinergic neurons in the basal forebrain.
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Affiliation(s)
- Z-W Zhou
- Section of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London SW10 9NH, UK
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Ma D, Zhang M, Chen L, Tang Q, Tang X, Mao Y, Zhou L. Hemangioblastomas might derive from neoplastic transformation of neural stem cells/progenitors in the specific niche. Carcinogenesis 2010; 32:102-9. [DOI: 10.1093/carcin/bgq214] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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213
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Nakazawa T, Kondo T, Niu D, Ma D, Mochizuki K, Kawasaki T, Kawaguchi Y, Kono K, Fujii H, Katoh R. Giant oesophageal liposarcoma mimicking spindle cell liposarcoma and containing eosinophilic cells with rhabdomyoblastic differentiation. J Clin Pathol 2010; 63:469. [PMID: 20418237 DOI: 10.1136/jcp.2010.075523] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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214
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Watts HR, Anderson PJB, Ma D, Philpott KL, Jen SM, Croucher M, Jen LS, Gentleman SM. Differential effects of amyloid-β peptide aggregation status on in vivo retinal neurotoxicity. Eye Brain 2010; 2:121-137. [PMID: 28539771 PMCID: PMC5436173 DOI: 10.2147/eb.s9902] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The present study examined the relationship between amyloid beta (Aβ)-peptide aggregation state and neurotoxicity in vivo using the rat retinal-vitreal model. Following single unilateral intravitreal injection of either soluble Aβ1-42 or Aβ1-42 preaggregated for different periods, retinal pathology was evaluated at 24 hours, 48 hours, and 1-month postinjection. Injection of either soluble Aβ (sAβ) or preaggregated Aβ induced a rapid reduction in immunoreactivity (IR) for synaptophysin, suggesting that direct contact with neurons is not necessary to disrupt synapses. Acute neuronal ionic and metabolic dysfunction was demonstrated by widespread loss of IR to the calcium buffering protein parvalbumin (PV) and protein gene product 9.5, a component of the ubiquitin-proteosome system. Injection of sAβ appeared to have a more rapid impact on PV than the preaggregated treatments, producing a marked reduction in PV cell diameters at 48 hours, an effect that was only observed for preaggregated Aβ after 1-month survival. Extending the preaggregation period from 4 to 8 days to obtain highly fibrillar Aβ species significantly increased the loss of choline acteyltransferase IR, but had no effect on PV-IR. These findings prompt the conclusion that Aβ assembly state has a significant impact on in vivo neurotoxicity by triggering distinct molecular changes within the cell.
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Affiliation(s)
- HR Watts
- Department of Medicine, Imperial College London, Charing Cross Campus, London, UK
| | - PJB Anderson
- Department of Medicine, Imperial College London, Charing Cross Campus, London, UK
| | - D Ma
- Department of Surgery and Cancer, Imperial College London, Chelsea and Westminster Hospital, London, UK
| | - KL Philpott
- Neurosciences, Centre of Excellence for Drug Discovery, GlaxoSmithKline Pharmaceuticals, Harlow, Essex, UK
| | - SM Jen
- Department of Medicine, Imperial College London, Charing Cross Campus, London, UK
| | - M Croucher
- Department of Medicine, Imperial College London, Charing Cross Campus, London, UK
| | - LS Jen
- Department of Medicine, Imperial College London, Charing Cross Campus, London, UK
| | - SM Gentleman
- Department of Medicine, Imperial College London, Charing Cross Campus, London, UK
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Sanders RD, Sun P, Patel S, Li M, Maze M, Ma D. Dexmedetomidine provides cortical neuroprotection: impact on anaesthetic-induced neuroapoptosis in the rat developing brain. Acta Anaesthesiol Scand 2010; 54:710-6. [PMID: 20003127 DOI: 10.1111/j.1399-6576.2009.02177.x] [Citation(s) in RCA: 213] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Recent evidence has demonstrated the anti-apoptotic of dexmedetomidine in different brain injury models. Herein, we investigated whether dexmedetomidine could directly protect against cortical injury in vitro and in vivo. METHODS Apoptosis was induced by staurosporine or wortmannin treatment in cortical neuronal cultures in vitro or by 6 h of isoflurane (0.75%) administration to post-natal day 7 rat pups in vivo. Dexmedetomidine was then applied in escalating doses to assess the neuroprotective potential of this agent. Cell survival was quantified using an MTT assay in vitro and in vivo apoptosis was assessed using cleaved caspase-3 immunohistochemistry. Cortical Western blots were conducted for the cellular survival proteins Bcl-2 and phosphorylated extracellular signal-regulated protein kinase (pERK)1 and 2. RESULTS In vitro dexmedetomidine dose-dependently prevented both staurosporine- and wortmannin-induced injury in cortical neuronal cultures, indicating that dexmedetomidine can prevent apoptosis when applied directly. In vivo isoflurane induced cortical neuroapoptosis compared with air (327+/-80 vs. 34+/-9 caspase-3-positive neurons; P<0.05). Dexmedetomidine inhibited isoflurane-induced caspase-3 expression (P<0.05), although the protection achieved did not completely attenuate the isoflurane injury (P<0.05 vs. air). Isoflurane treatment decreased Bcl-2 and pERK protein expression relative to air, an effect reversed by dexmedetomidine treatment. CONCLUSIONS Dexmedetomidine prevents cortical apoptosis in vitro and in vivo. However, using higher doses of dexmedetomidine does not further increase protection against isoflurane injury in the cortex than previously observed.
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Affiliation(s)
- R D Sanders
- Magill Department of Anaesthetics, Pain Medicine and Intensive Care, Imperial College London, Chelsea and Westminster Hospital, London, UK
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216
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Wen J, Ma D, Hoefert J, Yang F, Lu W, Parikh P. SU-GG-J-141: Development of a Novel Multipurpose Specimen Slicing-Imaging Platform. Med Phys 2010. [DOI: 10.1118/1.3468365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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217
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Bo QB, Geng DL, Ma D, Sun GX. A novel three-dimensional pillared-layer hybrid zinc phosphite featuring double-helical channels. RUSS J COORD CHEM+ 2010. [DOI: 10.1134/s1070328410060072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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218
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Fu Q, Li WX, Yao Y, Liu H, Su HY, Ma D, Gu XK, Chen L, Wang Z, Zhang H, Wang B, Bao X. Interface-Confined Ferrous Centers for Catalytic Oxidation. Science 2010; 328:1141-4. [DOI: 10.1126/science.1188267] [Citation(s) in RCA: 757] [Impact Index Per Article: 54.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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219
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220
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Wang L, Lockstone HE, Guest PC, Levin Y, Palotás A, Pietsch S, Schwarz E, Rahmoune H, Harris LW, Ma D, Bahn S. Expression profiling of fibroblasts identifies cell cycle abnormalities in schizophrenia. J Proteome Res 2010; 9:521-7. [PMID: 19916557 DOI: 10.1021/pr900867x] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Many previous studies have attempted to gain insight into the underlying pathophysiology of schizophrenia by studying postmortem brain tissues of schizophrenia patients. However, such analyses can be confounded by artifactual features of this approach such as lengthy agonal state and postmortem interval times. As several aspects of schizophrenia are also manifested at the peripheral level in proliferating cell types, we have studied the disorder through systematic transcriptomic and proteomic analyses of skin fibroblasts biopsied from living patients. We performed comparative transcriptomic and proteomic profiling to characterize skin fibroblasts from schizophrenia patients compared to healthy controls. Transcriptomic profiling using cDNA array technology showed that pathways associated with cell cycle regulation and RNA processing were altered in the schizophrenia subjects (n = 12) relative to controls (n = 12). LC-MS(E) proteomic profiling led to identification of 16 proteins that showed significant differences in expression between schizophrenia (n = 11) and control (n = 11) subjects. Analysis in silico revealed that these proteins were also associated with proliferation and cell growth pathways. To validate these findings at the protein level, fibroblast protein extracts were analyzed by Western blotting which confirmed the differential expression of three key proteins associated with these pathways. At the functional level, we confirmed the decreased proliferation phenotype by showing that cultured fibroblasts from schizophrenia subjects (n = 5) incorporated less (3)H-thymidine into their nuclei compared to those from controls (n = 6) by day 4 over an 8 day time course study. Similar abnormalities in cell cycle and growth pathways have been reported to occur in the central nervous system in schizophrenia. These studies demonstrate that fibroblasts obtained from living schizophrenia subjects show alterations in cellular proliferation and growth pathways. Future studies aimed at characterizing such pathways in fibroblasts and other proliferating cell types from schizophrenia patients could elucidate the molecular mechanisms associated with the pathophysiology of schizophrenia and provide a useful model to support drug discovery efforts.
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Affiliation(s)
- L Wang
- Institute of Biotechnology, University of Cambridge, Cambridge, UK
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221
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Sanders RD, Sun P, Patel S, Li M, Maze M, Ma D. Dexmedetomidine provides cortical neuroprotection: impact on anaesthetic-induced neuroapoptosis in the rat developing brain. Acta Anaesthesiol Scand 2009. [PMID: 20003127 DOI: 10.1111/j.1399-6576.2009.02177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Recent evidence has demonstrated the anti-apoptotic of dexmedetomidine in different brain injury models. Herein, we investigated whether dexmedetomidine could directly protect against cortical injury in vitro and in vivo. METHODS Apoptosis was induced by staurosporine or wortmannin treatment in cortical neuronal cultures in vitro or by 6 h of isoflurane (0.75%) administration to post-natal day 7 rat pups in vivo. Dexmedetomidine was then applied in escalating doses to assess the neuroprotective potential of this agent. Cell survival was quantified using an MTT assay in vitro and in vivo apoptosis was assessed using cleaved caspase-3 immunohistochemistry. Cortical Western blots were conducted for the cellular survival proteins Bcl-2 and phosphorylated extracellular signal-regulated protein kinase (pERK)1 and 2. RESULTS In vitro dexmedetomidine dose-dependently prevented both staurosporine- and wortmannin-induced injury in cortical neuronal cultures, indicating that dexmedetomidine can prevent apoptosis when applied directly. In vivo isoflurane induced cortical neuroapoptosis compared with air (327+/-80 vs. 34+/-9 caspase-3-positive neurons; P<0.05). Dexmedetomidine inhibited isoflurane-induced caspase-3 expression (P<0.05), although the protection achieved did not completely attenuate the isoflurane injury (P<0.05 vs. air). Isoflurane treatment decreased Bcl-2 and pERK protein expression relative to air, an effect reversed by dexmedetomidine treatment. CONCLUSIONS Dexmedetomidine prevents cortical apoptosis in vitro and in vivo. However, using higher doses of dexmedetomidine does not further increase protection against isoflurane injury in the cortex than previously observed.
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Affiliation(s)
- R D Sanders
- Magill Department of Anaesthetics, Pain Medicine and Intensive Care, Imperial College London, Chelsea and Westminster Hospital, London, UK
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Cheng Y, Hu R, Jin H, Ma K, Zhou S, Cheng H, Ma D, Li X. Effect of 14-3-3 tau protein on differentiation in BeWo choriocarcinoma cells. Placenta 2009; 31:60-6. [PMID: 19906423 DOI: 10.1016/j.placenta.2009.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Revised: 09/22/2009] [Accepted: 10/01/2009] [Indexed: 10/20/2022]
Abstract
This study aimed to investigate the location and function of tau isoform of 14-3-3 proteins in human trophoblast. 14-3-3 tau was localized in human cytotrophoblast cells, but not in syncytiotrophoblast cells in both first trimester and term placenta by immunochemistry stain. Forskolin-induced cell fusion (BeWo cells) confirmed that 14-3-3 tau was decreased during trophoblast differentiation. Forskolin-induced differentiation was stimulated by small-interfering (si) RNA induced down-regulation of 14-3-3 tau, contrarily, it was suppressed by plasmid induced upregulation of 14-3-3 tau in BeWo cells. When BeWo cells were treated with 14-3-3 tau siRNA, an increase in protein concentration of cell cycle inhibitor p27kip1 and a decrease in protein concentration of proliferating cell nuclear antigen, as well as activation of the extracellular signal-regulated kinase (ERK) pathway, were also noticed. These findings suggest that 14-3-3 tau might be mediated trophoblast differentiation through cell cycle regulation.
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Affiliation(s)
- Y Cheng
- Obstetrics & Gynecology Hospital, Fudan University, 419 Fangxie Road, Shanghai 200011, China
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Guo QS, Qin SY, Zhou SF, He L, Ma D, Zhang YP, Xiong Y, Peng T, Cheng Y, Li XT. Unbalanced translocation in an adult patient with premature ovarian failure and mental retardation detected by spectral karyotyping and array-comparative genomic hybridization. Eur J Clin Invest 2009; 39:729-37. [PMID: 19515099 DOI: 10.1111/j.1365-2362.2009.02141.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND There are only three cases of unbalanced translocation (X;1) reported in childhood in the literature, while no such phenotypic information is available in adults. MATERIALS AND METHODS To delineate the phenotype-genotype relationship of unbalanced translocation (X;1) in adulthood, we reported here a 20-year-old female with an unbalanced translocation (X;1) which was determined by spectral karyotyping, array-comparative genomic hybridization and subtelomeric fluorescence in situ hybridization (FISH). RESULTS The phenotype of partial trisomy 1 and partial monosomy X of the present case was much attenuated, including premature ovarian failure, mental retardation, class I obesity, mild dysmorphism and delayed secondary sexual characteristics. The breakpoints of the unbalanced translocation were accurately located at Xq28 and 1q32.1. The large amplification on Chromosome 1 q arm was found to involve 312 genes and the deletion on Chromosome X q arm also involved 141 genes. Overall, genes associated with physiological process (47 genes), cellular process (33), development (23), response to stimulus (1) and reproduction (1) were observed in the amplification on Chromosome 1 q arm. In addition, genes related to physiological process (23 genes), cellular process (13), development (6) and response to stimulus (2) were observed in the large deletion on chromosome X q arm. Late-replication studies revealed the existence of skewed X inactivation in the derivative X chromosome. CONCLUSIONS The phenotype of partial monosomy X and partial trisomy 1q is much attenuated in case of unbalanced translocation (X;1) in adulthood probably owing to skewed X inactivation in derivative X chromosome.
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Affiliation(s)
- Q S Guo
- Department of Maternal and Fetal Medicine, The Obstetrics & Gynecology Hospital, Fudan University, 419 Fangxie Road, Shanghai, China
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Abraham C, Low D, Sowell R, Grimm C, Gokhroo G, Michaletz-Lorenz M, Ma D, Olsen J, Creach K. INTER-OBSERVER VARIABILITY IN NON-TRANSVERSE SEGMENTATION. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)73080-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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225
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Ma D, Zhang H, Kennedy B, Parsons T, Olson WC. Antitumor activity of PSMA ADC after progression on docetaxel in a mouse xenograft model of human prostate cancer. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.3030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
3030 Background: Currently, there are no approved therapies for castration-resistant metastatic prostate cancer that has progressed following docetaxel therapy. Prostate-specific membrane antigen (PSMA) is an attractive target for antibody-targeted therapy of prostate cancer due to its abundant and restricted expression on the surface of prostate cancer cells. We have developed a novel antibody-drug conjugate (ADC) by linking a fully human PSMA monoclonal antibody to monomethylauristatin E (MMAE), a potent tubulin inhibitor. Here, we describe the use of PSMA ADC in a mouse model to treat xenografted human prostate tumors that have progressed following docetaxel therapy. Methods: Nude mice were implanted subcutaneously with 5 x 106 C4–2 human prostate cancer cells. Animals were first randomized to receive weekly intravenous (IV) doses of either 2 mg/kg docetaxel (n = 50) or vehicle (n = 10). Docetaxel significantly reduced tumor growth (p = 0.025) during the initial phase of the study; however, most of the tumors later progressed. When the tumor volume of an animal in the docetaxel group exceeded 400 mm3, the animal was rerandomized to receive continued docetaxel therapy (n = 18) or weekly IV doses of 6 mg/kg PSMA ADC (n = 18). Treatment effects were assessed by measuring tumor volume and overall survival. When tumor volume was assessed to be ≥2,000 mm3, animals would be sacrificed. Results: At 134 days following tumor implantation, the survival rate was 100% for animals in the PSMA ADC treatment group; 94% of these mice had tumor sizes <100 mm3. In the continued docetaxel treatment group, 14 of 18 animals that were sacrificed when their tumors exceeded 2,000 mm3; the survival rate was 22%. Therefore, PSMA ADC treatment significantly shrank tumors and increased overall survival of animals compared to continued docetaxel treatment (p < 0.0001). Conclusions: PSMA ADC had antitumor activity in mice to xenografted human prostate tumors that had progressed following docetaxel treatment. Treatment with PSMA ADC significantly extended survival in this setting. [Table: see text]
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Affiliation(s)
- D. Ma
- PSMA Development Company, LLC, Tarrytown, NY
| | - H. Zhang
- PSMA Development Company, LLC, Tarrytown, NY
| | - B. Kennedy
- PSMA Development Company, LLC, Tarrytown, NY
| | - T. Parsons
- PSMA Development Company, LLC, Tarrytown, NY
| | - W. C. Olson
- PSMA Development Company, LLC, Tarrytown, NY
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Ma D, Zhu J, Grigsby P. 55 oral: Utility of FDG-PET in Defining a High Risk GTV for Cervical Cancer. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(15)34312-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Nagy B, Fedonidis C, Photiou A, Wahba J, Paule CC, Ma D, Buluwela L, Nagy I. Capsaicin-sensitive primary sensory neurons in the mouse express N-Acyl phosphatidylethanolamine phospholipase D. Neuroscience 2009; 161:572-7. [PMID: 19327387 PMCID: PMC2724038 DOI: 10.1016/j.neuroscience.2009.03.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2009] [Revised: 03/17/2009] [Accepted: 03/17/2009] [Indexed: 01/30/2023]
Abstract
Our previous finding, that the capsaicin- and KCl-induced Ca2+-dependent production of the intra- and intercellular signaling molecule N-arachidonoyl ethanolamine (anandamide) in cultured primary sensory neurons could be abolished and reduced by ∼2/3 by capsaicin-induced degeneration of capsaicin-sensitive neurons, respectively suggests that a major sub-population of capsaicin-sensitive cells together with a group of non-capsaicin-sensitive cells should express enzymes involved in Ca2+-dependent anandamide synthesis. N-acyl phosphotidylethanolamine phospholipase D (NAPE-PLD) is known to be involved in Ca2+-dependent anandamide production. Hence, here, we used reverse transcriptase and quantitative real time polymerase chain reaction to study NAPE-PLD expression in dorsal root ganglia and to clarify the sub-population of cells expressing this enzyme. Cultures prepared from mouse dorsal root ganglia were grown either in the absence or presence of the neurotoxin, capsaicin (10 μM) overnight. We report, that NAPE-PLD is expressed both in dorsal root ganglia and cultures prepared from dorsal root ganglia and grown in the absence of capsaicin. Furthermore, we also report that capsaicin application downregulates the expression of NAPE-PLD as well as the capsaicin receptor, transient receptor potential vanilloid type 1 ion channel, by about 70% in the cultures prepared from dorsal root ganglia. These findings indicate that a major sub-population of capsaicin-sensitive primary sensory neurons expresses NAPE-PLD, and suggest that NAPE-PLD is expressed predominantly by capsaicin-sensitive neurons in dorsal root ganglia. These data also suggest that NAPE-PLD might be a target to control the activity and excitability of a major sub-population of nociceptive primary sensory neurons.
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Affiliation(s)
- B Nagy
- Department of Anaesthetics, Pain Medicine and Intensive Care, Imperial College London, Faculty of Medicine, Chelsea and Westminster Hospital, 369 Fulham Road, London SW10 9NH, UK
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Ma D, Stoica AD, Wang XL. Power-law scaling and fractal nature of medium-range order in metallic glasses. Nat Mater 2009; 8:30-34. [PMID: 19060888 DOI: 10.1038/nmat2340] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Accepted: 11/03/2008] [Indexed: 05/27/2023]
Abstract
The atomic structure of metallic glasses has been a long-standing scientific problem. Unlike crystalline metals, where long-range ordering is established by periodic stacking of fundamental building blocks known as unit cells, a metallic glass has no long-range translational or orientational order, although some degrees of short- and medium-range order do exist. Previous studies have identified solute- (minority atom)-centred clusters as the fundamental building blocks or short-range order in metallic glasses. Idealized cluster packing schemes, such as efficient cluster packing on a cubic lattice and icosahedral packing as in a quasicrystal, have been proposed and provided first insights on the medium-range order in metallic glasses. However, these packing schemes break down beyond a length scale of a few clusters. Here, on the basis of neutron and X-ray diffraction experiments, we propose a new packing scheme-self-similar packing of atomic clusters. We show that the medium-range order has the characteristics of a fractal network with a dimension of 2.31, and is described by a power-law correlation function over the medium-range length scale. Our finding provides a new perspective of order in disordered materials and has broad implications for understanding their structure-property relationship, particularly those involving a change in length scales.
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Affiliation(s)
- D Ma
- Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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229
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Rios HF, Ma D, Xie Y, Giannobile WV, Bonewald LF, Conway SJ, Feng JQ. Periostin is essential for the integrity and function of the periodontal ligament during occlusal loading in mice. J Periodontol 2008; 79:1480-90. [PMID: 18672999 DOI: 10.1902/jop.2008.070624] [Citation(s) in RCA: 171] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The ability of the periodontal ligament (PDL) to absorb and distribute forces is necessary for periodontal homeostasis. This adaptive response may be determined, in part, by a key molecule, periostin, which maintains the integrity of the PDL during occlusal function and inflammation. Periostin is primarily expressed in the PDL and is highly homologous to betaig-H3 (transforming growth factor-beta [TGF-beta] inducible gene). Cementum, alveolar bone, and the PDL of periostin-null mice dramatically deteriorate following tooth eruption. The purpose of this study was to determine the role of periostin in maintaining the functional integrity of the periodontium. METHODS The periodontia from periostin-null mice were characterized followed by unloading the incisors. The effect of substrate stretching on periostin expression was evaluated using a murine PDL cell line. Real-time reverse transcription-polymerase chain reaction was used to quantify mRNA levels of periostin and TGF-beta. TGF-beta1 neutralizing antibodies were used to determine whether the effects of substrate stretching on periostin expression are mediated through TGF-beta. RESULTS Severe periodontal defects were observed in the periostin-null mice after tooth eruption. The removal of masticatory forces in periostin-null mice rescue the periodontal defects. Periostin expression was increased in strained PDL cells by 9.2-fold at 48 hours and was preceded by a transient increase in TGF-beta mRNA in vitro. Elevation of periostin in response to mechanical stress was blocked by the addition of 2.5 ng/ml neutralizing antibody to TGF-beta1, suggesting that mechanical strain activates TGF-beta to have potential autocrine effects and to increase periostin expression. CONCLUSION Mechanical loading maintains sufficient periostin expression to ensure the integrity of the periodontium in response to occlusal load.
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Affiliation(s)
- H F Rios
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA.
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Svidzinsky A, Chen G, Chin S, Kim M, Ma D, Murawski R, Sergeev A, Scully M, Herschbach D. Bohr model and dimensional scaling analysis of atoms and molecules. INT REV PHYS CHEM 2008. [DOI: 10.1080/01442350802364664] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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231
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Sanders RD, Ma D, Brooks P, Maze M. Balancing paediatric anaesthesia: preclinical insights into analgesia, hypnosis, neuroprotection, and neurotoxicity. Br J Anaesth 2008; 101:597-609. [PMID: 18796440 DOI: 10.1093/bja/aen263] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Logistical and ethical reasons make conducting clinical research in paediatric practice difficult, and therefore safe and efficacious advances are dependent on good preclinical research. For example, notable advances have been made in preclinical studies of pain processing that correlate well with patient data. Other areas of paediatric anaesthetic research remain in their infancy including mechanisms of anaesthesia and anaesthetic neuroprotection and neurotoxicity. Animal data have identified the potential 'double-edged' sword of administering anaesthetic agents in the young; although these agents can be neuroprotective in certain circumstances, they can be neurotoxic in others. The potential for this toxicity must be balanced against the importance of providing adequate anaesthesia for which there can be no compromise. We review the current state of preclinical research in paediatric anaesthesia and identify areas which require further exploration in order to provide the foundations for well-conducted clinical trials.
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Affiliation(s)
- R D Sanders
- Department of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, London, UK.
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Huang X, Zhuang L, Cao Y, Gao Q, Han Z, Tang D, Xing H, Zhou J, Ma D. Biodistribution and kinetics of the novel selective oncolytic adenovirus M1 after systemic administration. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)71664-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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233
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Julka PK, Chacko RT, Nag S, Parshad R, Nair A, Oh DS, Hu Z, Koppiker CB, Nair S, Dawar R, Dhindsa N, Miller ID, Ma D, Lin B, Awasthy B, Perou CM. A phase II study of sequential neoadjuvant gemcitabine plus doxorubicin followed by gemcitabine plus cisplatin in patients with operable breast cancer: prediction of response using molecular profiling. Br J Cancer 2008; 98:1327-35. [PMID: 18382427 PMCID: PMC2361717 DOI: 10.1038/sj.bjc.6604322] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2007] [Revised: 02/25/2008] [Accepted: 02/26/2008] [Indexed: 02/07/2023] Open
Abstract
This study examined the pathological complete response (pCR) rate and safety of sequential gemcitabine-based combinations in breast cancer. We also examined gene expression profiles from tumour biopsies to identify biomarkers predictive of response. Indian women with large or locally advanced breast cancer received 4 cycles of gemcitabine 1200 mg m(-2) plus doxorubicin 60 mg m(-2) (Gem+Dox), then 4 cycles of gemcitabine 1000 mg m(-2) plus cisplatin 70 mg m(-2) (Gem+Cis), and surgery. Three alternate dosing sequences were used during cycle 1 to examine dynamic changes in molecular profiles. Of 65 women treated, 13 (24.5% of 53 patients with surgery) had a pCR and 22 (33.8%) had a complete clinical response. Patients administered Gem d1, 8 and Dox d2 in cycle 1 (20 of 65) reported more toxicities, with G3/4 neutropenic infection/febrile neutropenia (7 of 20) as the most common cycle-1 event. Four drug-related deaths occurred. In 46 of 65 patients, 10-fold cross validated supervised analyses identified gene expression patterns that predicted with >or=73% accuracy (1) clinical complete response after eight cycles, (2) overall clinical complete response, and (3) pCR. This regimen shows strong activity. Patients receiving Gem d1, 8 and Dox d2 experienced unacceptable toxicity, whereas patients on other sequences had manageable safety profiles. Gene expression patterns may predict benefit from gemcitabine-containing neoadjuvant therapy.
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Affiliation(s)
- P K Julka
- Department of Radiotherapy and Oncology, AIIMS, New Delhi 110029, India
| | - R T Chacko
- Department of Medical Oncology, Christian Medical College, Vellore, Tamil Nadu 632004, India
| | - S Nag
- Department of Medical Oncology, HCJMRI, Pune, Maharashtra 411001, India
| | - R Parshad
- Department of Radiotherapy and Oncology, AIIMS, New Delhi 110029, India
| | - A Nair
- Department of Medical Oncology, Christian Medical College, Vellore, Tamil Nadu 632004, India
| | - D S Oh
- Departments of Genetics and Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Z Hu
- Departments of Genetics and Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - C B Koppiker
- Department of Medical Oncology, HCJMRI, Pune, Maharashtra 411001, India
| | - S Nair
- Department of Medical Oncology, Christian Medical College, Vellore, Tamil Nadu 632004, India
| | - R Dawar
- Department of Radiotherapy and Oncology, AIIMS, New Delhi 110029, India
| | - N Dhindsa
- Eli Lilly and Company (India) Pvt. Ltd., Gurgaon, Haryana 122001, India
| | - I D Miller
- Department of Pathology, Aberdeen Royal Infirmary, Foresterhill, Aberdeen AB25 2ZD, UK
| | - D Ma
- Eli Lilly and Company, Indianapolis, IN 46285, USA
| | - B Lin
- Eli Lilly and Company, Indianapolis, IN 46285, USA
| | - B Awasthy
- Health Care Global Enterprises, Curie Centre of Oncology, St John's Hospital Campus, Koramangala, Bangalore 560034, India
| | - C M Perou
- Departments of Genetics and Pathology and Laboratory Medicine, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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Huang J, Shi T, Ma T, Zhang Y, Ma X, Lu Y, Song Q, Liu W, Ma D, Qiu X. CCDC134, a novel secretory protein, inhibits activation of ERK and JNK, but not p38 MAPK. Cell Mol Life Sci 2008; 65:338-49. [PMID: 18087676 DOI: 10.1007/s00018-007-7448-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In this study, we report a novel gene, CCDC134 (coiled-coil domain containing 134), that encodes a secretory protein that can inhibit the MAPK pathway as a novel human MAPK-regulating protein. The CCDC134 mRNA contains 1280 nucleotides, encoding a protein of 229 amino acids. CCDC134 is a classical secretory protein. Expression profile analysis by Northern blot, RT-PCR, immunohistochemistry and Western blot reveals that CCDC134 is widely expressed in normal adult tissues, tumor tissues and cell lines. Functional investigation reveals that overexpression of CCDC134 and its purified protein significantly inhibit transcriptional activity of Elk1 and phosphorylation of Erk and JNK/SAPK but not p38 MAPK. Conversely, specific siRNA against CCDC134 activates Elk1 transcriptional activity and promotes Erk and JNK/SAPK phosphorylation. These results clearly indicate that CCDC134 is a novel member of the secretory family and down-regulates the Raf-1/MEK/ERK and JNK/ SAPK pathways.
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Affiliation(s)
- J Huang
- School of Basic Medical Science, Peking University Health Science Center, Beijing, People's Republic of China
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Muchemwa FC, Ma D, Inoue Y, Curtin JA, Bastian BC, Ihn H, Kageshita T. Constitutive activation of the phosphatidyl inositol 3 kinase signalling pathway in acral lentiginous melanoma. Br J Dermatol 2007; 158:411-3. [PMID: 17999703 DOI: 10.1111/j.1365-2133.2007.08292.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Diao Y, Ma D, Wen Z, Yin J, Xiang J, Li M. Using pseudo amino acid composition to predict transmembrane regions in protein: cellular automata and Lempel-Ziv complexity. Amino Acids 2007; 34:111-7. [PMID: 17520325 DOI: 10.1007/s00726-007-0550-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2007] [Accepted: 03/21/2007] [Indexed: 10/23/2022]
Abstract
Transmembrane (TM) proteins represent about 20-30% of the protein sequences in higher eukaryotes, playing important roles across a range of cellular functions. Moreover, knowledge about topology of these proteins often provides crucial hints toward their function. Due to the difficulties in experimental structure determinations of TM protein, theoretical prediction methods are highly preferred in identifying the topology of newly found ones according to their primary sequences, useful in both basic research and drug discovery. In this paper, based on the concept of pseudo amino acid composition (PseAA) that can incorporate sequence-order information of a protein sequence so as to remarkably enhance the power of discrete models (Chou, K. C., Proteins: Structure, Function, and Genetics, 2001, 43: 246-255), cellular automata and Lempel-Ziv complexity are introduced to predict the TM regions of integral membrane proteins including both alpha-helical and beta-barrel membrane proteins, validated by jackknife test. The result thus obtained is quite promising, which indicates that the current approach might be a quite potential high throughput tool in the post-genomic era. The source code and dataset are available for academic users at liml@scu.edu.cn.
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Affiliation(s)
- Y Diao
- College of Chemistry, Sichuan University, Chengdu, Sichuan, China
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Chen Y, Li G, Yin S, Xu J, Ji Z, Xiu X, Liu L, Ma D. Genetic polymorphisms involved in toxicant-metabolizing enzymes and the risk of chronic benzene poisoning in Chinese occupationally exposed populations. Xenobiotica 2007; 37:103-12. [PMID: 17178637 DOI: 10.1080/00498250601001662] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Benzene is a recognized haematotoxin and leukaemogen, but its mechanism of action and the role of genetic susceptibility are still unclear. Cytochrome P450 2E1 (CYP2E1) and myeloperoxidase (MPO) are involved in benzene activation; and NAD (P)H:quinine oxidoreductase 1 (NQO1), glutathione S-transferase theta 1 (GSTT1) and glutathione S-transferase mu 1 (GSTM1) participate in benzene detoxification. The common, well-studied single-nucleotide polymorphisms (SNPs) were analysed in these genes drawn from the toxicant-metabolizing pathways. A total of 100 workers with chronic benzene poisoning (CBP) and 90 controls were enrolled in China. There was a 2.82-fold (95% CI = 1.42-5.58) increased risk of CBP in the subjects with the NQO1 609C > T mutation genotype (T/T) compared with those carrying heterozygous (C/T) and wild-type (C/C). The subjects with the GSTT1 null genotype had a 1.91-fold (95% CI = 1.05-3.45) increased risk of CBP compared with those with GSTT1 non-null genotype. There was no association of CYP2E1 and MPO genotype with CBP. A three genes' interaction showed that there was a 20.41-fold (95% CI = 3.79-111.11) increased risk of CBP in subjects with the NQO1 609C > T T/T genotype and with the GSTT1 null genotype and the GSTM1 null genotype compared with those carrying the NQO1 609C > T C/T and C/C genotype, GSTT1 non-null genotype, and GSTM1 non-null genotype. The study provides evidence of an association of a gene-gene interaction with the risk of CBP.
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Affiliation(s)
- Y Chen
- College of Public Health, XinJiang Medical University, Urumqi, China.
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Abstract
BACKGROUND Platelet activation is implicated in thrombotic disorders, but has not been described in acute clinical pulmonary embolism (PE). OBJECTIVES To investigate the natural history of platelet activation in PE and associated markers of inflammation, thrombosis and cardiac dysfunction. METHODS Thirty-five consecutive patients (age 62 +/-17 years) with acute PE were prospectively enrolled and followed for 6 months. Platelet activation was assessed by flow cytometry [measuring expression of platelet P-selectin, conformational activation of glycoprotein IIb/IIIa complex (PAC-1) and formation of platelet-leukocyte complexes] and by plasma soluble P-selectin. Platelet activation, right ventricular (RV) function (assessed as RV ejection area by transthoracic echocardiography), D-dimer and high-sensitivity C-reactive protein (hs-CRP) were measured at presentation and repeated over 6 months follow-up. RESULTS Soluble P-selectin (56 +/-19 ng mL(-1), anovaP < 0.0001) and PAC-1 (1.5 +/- 1.8%, anovaP = 0.005) were mildly but significantly increased in patients with acute PE relative to healthy young men (soluble P-selectin 33 +/- 13 ng mL(-1), P < 0.001; PAC-1 binding 0.5 +/- 0.6%, P < 0.01) and age-matched controls (soluble P-selectin 31 +/- 9 ng mL(-1), P < 0.001; PAC-1 binding 0.4 +/-0.4%, P < 0.05). Platelet P-selectin expression and platelet-leukocyte complexes were not increased during acute PE. Echocardiographic RV ejection area correlated inversely with soluble P-selectin (r = -0.47, P = 0.007) and positively with platelet P-selectin (r = 0.49, P = 0.0007), suggesting P-selectin is shed from activated platelets in proportion to the severity of RV dysfunction. Elevated soluble P-selectin, D-dimer and hs-CRP demonstrated a time-dependent return to normal during 6 months follow-up. CONCLUSION Platelet activation is evident after acute PE. Platelet activation correlates with the severity of RV dysfunction, and can persist for several months after acute PE.
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Affiliation(s)
- T Chung
- Department of Cardiology, Concord Hospital, ANZAC Research Institute, University of Sydney, Sydney, Australia
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239
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Martin JL, Ma D, Hossain M, Xu J, Sanders RD, Franks NP, Maze M. Asynchronous administration of xenon and hypothermia significantly reduces brain infarction in the neonatal rat. Br J Anaesth 2007; 98:236-40. [PMID: 17210733 DOI: 10.1093/bja/ael340] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Neonatal asphyxia causes long-term neurological and behavioural impairment in the developing brain. Concurrent administration of xenon and hypothermia synergistically reduces long-term damage in a rat model of neonatal asphyxia. This study sought to investigate whether asynchronous administration of xenon and hypothermia is capable of combining synergistically to provide neuroprotection. METHODS Seven-day-old rats were subjected to right common carotid artery occlusion followed by 90 min hypoxia with 8% oxygen. After a 1 h recovery period, rats received asynchronous administration of mild hypothermia (35 degrees C) and xenon (20%) with a 1 or 5 h gap between interventions, xenon (20%) alone, or mild hypothermia (35 degrees C) alone. Infarct volume in the brain was measured 4 days after injury. RESULTS Administration of hypothermia or xenon alone, 1 and 6 h after the hypoxic ischaemic insult, respectively, provided no neuroprotection. Asynchronous administration of xenon and hypothermia at a 1 h interval produced a significant reduction in infarct volume [93 (7) vs 74 (8); P < 0.05]. Reduction in infarct volume was also present when hypothermia and xenon were asynchronously administered with an intervening gap of 5 h [97 (5) vs 83 (3); P < 0.05]. CONCLUSIONS This finding provides a rationale for investigating the combined use of hypothermia and xenon in a progressive manner for the management of neonatal asphyxia. Thus, hypothermia can be administrated at the site of delivery and xenon can be administered later.
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Affiliation(s)
- J L Martin
- Department of Anaesthetics, Pain Medicine, and Intensive Care, Imperial College London, London, UK
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240
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Chung T, Connor D, Joseph J, Emmett L, Mansberg R, Ma D, Kritharides L. Shedding of P-selectin from Activated Platelets Correlates with the Severity of Right Ventricular Dysfunction During Acute Pulmonary Embolism. Heart Lung Circ 2007. [DOI: 10.1016/j.hlc.2007.06.157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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241
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Zang S, Ji C, Qu X, Dong X, Ma D, Ye J, Ma R, Dai J, Guo D. A study on Notch signaling in human breast cancer. Neoplasma 2007; 54:304-10. [PMID: 17822320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Breast cancer is one of the leading causes of cancer death in women. The Notch family of proteins plays crucial roles in determining cell fates such as proliferation, differentiation and apoptosis. A role for Notch signaling in human breast cancer has been suggested by the development of adenocarcinomas in the murine mammary gland. However, it is not clear currently whether Notch signaling is frequently expressed and activated in breast cancers. Here we show that Notch signaling is overexpressed and highly activated in breast cancers. More significantly, the attenuation of Notch signaling by gamma-secretase inhibitor can inhibit the proliferation of breast cancer cells by both causing cell cycle arrest and apoptosis. Thus, targeting Notch signaling may be of therapeutic value in breast cancers.
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Amyloid Precursor Protein Secretases/antagonists & inhibitors
- Amyloid Precursor Protein Secretases/metabolism
- Apoptosis/physiology
- Basic Helix-Loop-Helix Transcription Factors/genetics
- Basic Helix-Loop-Helix Transcription Factors/metabolism
- Breast/metabolism
- Breast/pathology
- Breast Neoplasms/genetics
- Breast Neoplasms/metabolism
- Breast Neoplasms/pathology
- Calcium-Binding Proteins/genetics
- Calcium-Binding Proteins/metabolism
- Cell Cycle/physiology
- Cell Line, Tumor
- Cell Proliferation
- Homeodomain Proteins/genetics
- Homeodomain Proteins/metabolism
- Humans
- Intercellular Signaling Peptides and Proteins/genetics
- Intercellular Signaling Peptides and Proteins/metabolism
- Membrane Proteins/genetics
- Membrane Proteins/metabolism
- Protease Inhibitors/pharmacology
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA, Neoplasm/genetics
- RNA, Neoplasm/metabolism
- Receptor, Notch1/genetics
- Receptor, Notch1/metabolism
- Receptor, Notch3
- Receptor, Notch4
- Receptors, Notch/genetics
- Receptors, Notch/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Serrate-Jagged Proteins
- Signal Transduction
- Transcription Factor HES-1
- Up-Regulation
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Affiliation(s)
- S Zang
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, P. R. China
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242
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He G, Wang J, Ma D. This Paper Has Been Withdrawn.Highly Convergent Route to Cyclopeptide Alkaloids. Total Synthesis of Ziziphine N. Org Lett 2006. [DOI: 10.1021/ol062639z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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243
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Chan DC, Chen VJ, Zhang Z, Helfrich B, Hirsch FR, Ma D, Bunn PA. Studies of pemetrexed and gemcitabine, alone and in combinations, in human lung cancer models. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.17114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
17114 Background: Gemcitabine (GEM) is a deoxycytidine analog that inhibits DNA synthesis. Pemetrexed (ALIMTA, PEM) is a novel antifolate inhibiting multiple enzymes targets, including thymidylate synthase (TS). This study aimed at evaluating the antitumor effects of these antimetabolites against NSCLC and SCLC tumor models. Methods: In vitro growth inhibition (IC50) studies were done by 6-days MTT assays against a panel of 20 NSCLC and 17 SCLC cell lines. In vivo studies used only NSCLC H2122 tumor line, implanted either subcutaneously in athymic nude mice or orthotopically in athymic nude rats. Drugs were given via the ip route at the designated schedules. Results: Against NSCLC and SCLC cell lines, the averaged IC50s of GEM were 0.015 ± 0.008 μM and 0.055 ± 0.04 μM respectively. The corresponding averaged IC50s for PEM were 0.65 ± 0.2 μM and 0.091±0.018 μM respectively. When H2122 tumors reached 50–100mg, mice were treated with 10 daily doses of PEM at 100, 200 and 300 mg/kg, or three doses of GEM every 4 days at 30, 60 and 120 mg/kg. PEM delayed tumor growth by 12 to 18 days, and GEM delayed by 10 to 14 days, relative to vehicle control. Results of three combination regimens with GEM (30 mg/kg) and PEM (100 mg/kg) were: (1) GEM → PEM gave intermediate activities between the two single agents, but was toxic to animals; (2) PEM and GEM given concurrently were more active than single agents alone and delayed tumor growth by 12 days with some toxic side effects; (3) PEM → GEM was better than the single agents alone, and delayed tumor growth by ∼14 days without toxicity. Athymic nude rats bearing orthotopic H2122 tumors given PEM daily at 50, 100 and 200 mg/kg for 21 days had significantly prolonged survival, but not in a dose-dependent manner. PEM at 50 mg/kg was more effective than doses at 100 or 200 mg/kg. GEM was toxic to nude rats due to poor plasma deamination of GEM. Conclusions: In vitro, PEM was more potent against SCLC than NSCLC cell lines, but GEM had similar activities against all lung lines tested. Studies of H2122 xenografts in rodent supported PEM → GEM as the preferred sequence for the combined administration of these two drugs. [Table: see text]
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Affiliation(s)
- D. C. Chan
- University of Colorado Cancer Center, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - V. J. Chen
- University of Colorado Cancer Center, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - Z. Zhang
- University of Colorado Cancer Center, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - B. Helfrich
- University of Colorado Cancer Center, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - F. R. Hirsch
- University of Colorado Cancer Center, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - D. Ma
- University of Colorado Cancer Center, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - P. A. Bunn
- University of Colorado Cancer Center, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
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244
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Eismann U, Oberschmidt O, Ehnert M, Fleeth J, Lüdtke F, Struck S, Schulz L, Blatter J, Ma D, Hanauske A. Thymidylate synthase gene expression in solid tumors predicts for response to pemetrexed in vitro. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.13058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
13058 Background: Pemetrexed (P) is a novel antifolate which targets thymidilate synthase (TS), dihydrofolate reductase (DHFR), and glycinamide ribonucleotide formyltransferase (GARFT). The aim of the present study was to identify gene expression thresholds for these enzymes in human tumor specimens in order to separate P-sensitive from P-resistant patients. Methods: Soft-agar cloning assays were performed on freshly biopsied tumor cells exposed one hour to clinically achievable concentrations of P. In parallel, RNA was isolated, transcribed to cDNA and subsequently used for multiplex real-time PCR. Gene expression data were normalized against beta-actin transcripts followed by correlation against cloning assay results. Iterative calculations (fourfold analysis) were done for each enzyme separately to find the best cutoff for prediction of sensitivity to P. Results: Sensitive and resistant tumor samples were statistically significant different in gene expression of TS, DHFR, and GARFT (p < 0.003). 81% of all tumors with a TS copy number < 144 (related to 104 copies β-actin) were sensitive to P in vitro. (specificity = 0.69; chi2 = 14.14). Statistical tests demonstrated that gene expression of TS, DHFR, and GARFT are dependent variables and that TS transcription is the leading variable. The combination of TS, DHFR, and GARFT expression data was not superior to TS alone. Conclusions: TS expression is the most meaningful predictor for sensitivity (≤ 144 copies) or resistance (> 144 copies) to Pemetrexed in fresh tumor tissue. This observation forms a rationale for clinical trials using TS expression as predictor for clinical response. No significant financial relationships to disclose.
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Affiliation(s)
- U. Eismann
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - O. Oberschmidt
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - M. Ehnert
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - J. Fleeth
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - F. Lüdtke
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - S. Struck
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - L. Schulz
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - J. Blatter
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - D. Ma
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - A. Hanauske
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
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245
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Oh DS, Carey LA, Fan C, Sawyer L, Hu Z, Ma D, Perou C. Expression profiles can predict both general chemotherapy and gemcitabine-specific responses in breast cancer patients receiving neoadjuvant therapy. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.10008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
10008 Background: The identification of markers predictive of neoadjuvant chemotherapy response would be an important advance. Therefore, we sought to identify gene expression profiles predictive of neoadjuvant response and evaluated their drug specificity. Methods: DNA microarray analysis was performed on pre-treatment core biopsies from two different locally advanced breast cancer patient sets receiving neoadjuvant chemotherapy; the first set (L9819) was treated with 4 cycles of doxorubicin + cyclophosphamide (AC) followed by 4 cycles of paclitaxel (T) or paclitaxel + trastuzumab (TH). The second patient set (S329) received 4 cycles of gemcitabine + doxorubicin followed by 4 cycles of gemcitabine + cisplatin. Clinical response was based on RECIST criteria. Results: We obtained successful microarrays on 44 (L9819) and 46 (S329) of the patients enrolled. Ten-fold cross-validated supervised analyses separately performed on each dataset identified gene expression patterns that accurately predicted (75–85% accuracy) response (clinical complete responders vs. others) evaluated on those patients that completed all 8 cycles of chemotherapy. The predictive expression patterns from the L9819 trial were significantly enriched for apoptosis genes, while the predictive gene set from the S329 trial was enriched for nucleotide metabolism genes. The L9819 predictor was able to accurately predict (75% accuracy) response for the S329 patients, however, the S329 predictor was not able to predict response on the L9819 trial (50% accuracy). We speculate that the L9819 predictor was able to predict response on the S329 dataset (despite the fact that only doxorubicin was common to both trials) because this profile was enriched for apoptosis genes that may reflect a general mechanism of chemotherapy response/resistance, while the S329 predictor was more tuned to gemcitabine’s specific mechanism of action. Conclusions: This study may provide the means to predict response to AC-T(H) and GA-GC neoadjuvant chemotherapy. The ability of one predictor to work on the other dataset, but not vise versa, suggests that both general chemotherapy and drug specific response profiles may have been identified. [Table: see text]
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Affiliation(s)
- D. S. Oh
- University of North Carolina, Chapel Hill, NC; Eli Lilly and Company, Indianapolis, IN
| | - L. A. Carey
- University of North Carolina, Chapel Hill, NC; Eli Lilly and Company, Indianapolis, IN
| | - C. Fan
- University of North Carolina, Chapel Hill, NC; Eli Lilly and Company, Indianapolis, IN
| | - L. Sawyer
- University of North Carolina, Chapel Hill, NC; Eli Lilly and Company, Indianapolis, IN
| | - Z. Hu
- University of North Carolina, Chapel Hill, NC; Eli Lilly and Company, Indianapolis, IN
| | - D. Ma
- University of North Carolina, Chapel Hill, NC; Eli Lilly and Company, Indianapolis, IN
| | - C. Perou
- University of North Carolina, Chapel Hill, NC; Eli Lilly and Company, Indianapolis, IN
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246
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Llombart-Cussac A, Martin M, Harbeck N, Anghel R, Eniu A, Melemed A, Clark R, Simms L, Kaiser C, Ma D. Randomized, phase II study of two doses of pemetrexed as first-line chemotherapy for locally advanced or metastatic breast cancer (MBC): Clinical results and exploratory pharmacogenomic analysis. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.3077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
3077 Background: Pemetrexed, a folate antimetabolite, has shown varied response in MBC, depending on the dose, vitamin supplementation, and patient pre-treatment status. We conducted a randomized, double-blind, phase II study, in patients with locally advanced or MBC to evaluate 2 doses of pemetrexed. Primary objective was to assess the response rates on the 2 arms. Methods: Women with histologic/cytologic diagnosis of breast cancer, evidence of locally recurrent disease or distant metastasis, not amenable to local therapy were eligible. Patients received pemetrexed (600 mg/m2 Arm A; or 900 mg/m2 Arm B), on D1 of a 21-day cycle. All patients received folic acid and vitamin B12 supplementation. Forty-three patients were planned on each arm. Results: Ninety-two patients (median age 57 years, range 33–81) enrolled: 47 on arm A and 45 on arm B. Arms A and B had response rates of 17.0% (95% CI, 7.7%-30.8%), and 15.6% (95% CI, 6.5%-29.5%), median progression free survival times of 4.2 and 4.1 months, and median times to tumor progression (TtTP) of 4.2 and 4.6 months, respectively. On both arms, a median of 6 cycles was delivered. Toxicity was mild (grade 3/4 toxicity on both arms; neutropenia <20%, leucopenia <9%). Primary tumor samples from 49 patients were assessed for 10 folate or pyrimidine metabolism related gene expressions by reverse transcriptase-polymerase chain reaction methodology. Two markers, folypolyglutamate synthase (FPGS) and thymidine phosphorylase (TP), showed significant results. Best response rates and median TtTP for high vs low FPGS expression subgroups were 37.5% vs 10.0% and 8.6 vs 3.0 months. The corresponding results for TP were 27.6% vs 6.3% and 5.4 vs 1.9 months. Conclusions: Efficacy and safety of the two pemetrexed doses were similar; thus, the lower dose (600 mg/m2) is suitable in patients with MBC. Exploratory biomarker analysis suggests efficacy correlation for FPGS and TP. Further evaluation of these markers appears warranted. [Table: see text]
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Affiliation(s)
- A. Llombart-Cussac
- Hospital Universitario Arnau Vilanova, Lleida, Spain; Hospital Universitario San Carlos, Madrid, Spain; Frauenklinik der Technischen Universitaet Muenchen, Munich, Germany; Institutul Oncologic, Bucuresti, Romania; Cancer Institute, Cluj-Napoca, Romania; Eli Lilly and Company, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; Eli Lilly Canada Inc., Toronto, ON, Canada
| | - M. Martin
- Hospital Universitario Arnau Vilanova, Lleida, Spain; Hospital Universitario San Carlos, Madrid, Spain; Frauenklinik der Technischen Universitaet Muenchen, Munich, Germany; Institutul Oncologic, Bucuresti, Romania; Cancer Institute, Cluj-Napoca, Romania; Eli Lilly and Company, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; Eli Lilly Canada Inc., Toronto, ON, Canada
| | - N. Harbeck
- Hospital Universitario Arnau Vilanova, Lleida, Spain; Hospital Universitario San Carlos, Madrid, Spain; Frauenklinik der Technischen Universitaet Muenchen, Munich, Germany; Institutul Oncologic, Bucuresti, Romania; Cancer Institute, Cluj-Napoca, Romania; Eli Lilly and Company, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; Eli Lilly Canada Inc., Toronto, ON, Canada
| | - R. Anghel
- Hospital Universitario Arnau Vilanova, Lleida, Spain; Hospital Universitario San Carlos, Madrid, Spain; Frauenklinik der Technischen Universitaet Muenchen, Munich, Germany; Institutul Oncologic, Bucuresti, Romania; Cancer Institute, Cluj-Napoca, Romania; Eli Lilly and Company, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; Eli Lilly Canada Inc., Toronto, ON, Canada
| | - A. Eniu
- Hospital Universitario Arnau Vilanova, Lleida, Spain; Hospital Universitario San Carlos, Madrid, Spain; Frauenklinik der Technischen Universitaet Muenchen, Munich, Germany; Institutul Oncologic, Bucuresti, Romania; Cancer Institute, Cluj-Napoca, Romania; Eli Lilly and Company, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; Eli Lilly Canada Inc., Toronto, ON, Canada
| | - A. Melemed
- Hospital Universitario Arnau Vilanova, Lleida, Spain; Hospital Universitario San Carlos, Madrid, Spain; Frauenklinik der Technischen Universitaet Muenchen, Munich, Germany; Institutul Oncologic, Bucuresti, Romania; Cancer Institute, Cluj-Napoca, Romania; Eli Lilly and Company, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; Eli Lilly Canada Inc., Toronto, ON, Canada
| | - R. Clark
- Hospital Universitario Arnau Vilanova, Lleida, Spain; Hospital Universitario San Carlos, Madrid, Spain; Frauenklinik der Technischen Universitaet Muenchen, Munich, Germany; Institutul Oncologic, Bucuresti, Romania; Cancer Institute, Cluj-Napoca, Romania; Eli Lilly and Company, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; Eli Lilly Canada Inc., Toronto, ON, Canada
| | - L. Simms
- Hospital Universitario Arnau Vilanova, Lleida, Spain; Hospital Universitario San Carlos, Madrid, Spain; Frauenklinik der Technischen Universitaet Muenchen, Munich, Germany; Institutul Oncologic, Bucuresti, Romania; Cancer Institute, Cluj-Napoca, Romania; Eli Lilly and Company, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; Eli Lilly Canada Inc., Toronto, ON, Canada
| | - C. Kaiser
- Hospital Universitario Arnau Vilanova, Lleida, Spain; Hospital Universitario San Carlos, Madrid, Spain; Frauenklinik der Technischen Universitaet Muenchen, Munich, Germany; Institutul Oncologic, Bucuresti, Romania; Cancer Institute, Cluj-Napoca, Romania; Eli Lilly and Company, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; Eli Lilly Canada Inc., Toronto, ON, Canada
| | - D. Ma
- Hospital Universitario Arnau Vilanova, Lleida, Spain; Hospital Universitario San Carlos, Madrid, Spain; Frauenklinik der Technischen Universitaet Muenchen, Munich, Germany; Institutul Oncologic, Bucuresti, Romania; Cancer Institute, Cluj-Napoca, Romania; Eli Lilly and Company, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; Eli Lilly Canada Inc., Toronto, ON, Canada
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247
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Nakajima E, Helfrich B, Chan D, Zhang Z, Hirsch FR, Chen V, Ma D, Bunn PA. Enzastaurin a protein kinase Cbeta-selective inhibitor, inhibits the growth of SCLC and NSCLC cell lines. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.13138] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
13138 Background: PKCβ is a member of the PKC family of serine-threonine protein kinases involved in tumor cell proliferation and apoptosis. Inhibition of PKCs induced differentiation and enhanced chemotherapy. PKCβ activation is required for tumor-induced angiogenesis. The PKCβ-selective inhibitor enzastaurin, originally developed as an antiangiogenic agent, inhibited tumor cell proliferation in prostate, colon and glioblastoma cell lines in vitro. In NSCLC lines, enhanced phosphorylation and altered PKC expression was demonstrated. In SCLC lines specific PKC isoforms were associated with cisplatin resistance. Methods: The growth inhibitory effects of enzastaruin were evaluated by 6-day MTT assays; the cell cycle effects by FACS analysis; the effects on downstream phophorylated signaling molecules by western blotting. Results: Enzastaurin inhibited the growth of 11 SCLC lines (IC50s 3–10 μM) and 4 NSCLC cell lines (IC50s 3–10 μM). An increase of 7–31% of cells in the G2/M phase of the cell cycle compared to untreated control was observed following 48 hour exposure to the IC50 dose of enzastaurin in both SCLC and NSCLC cell lines. PKCβ has been shown to phosphorylate both GSK3β and Akt. A 24-hour IC50 enzastaurin exposure significantly reduced phosphorylation of GSK3β (Ser9) in both SCLC and NSCLC lines. No changes were observed in phospho-AKT (Thr308) in either SCLC or NSCLC cell lines. Phospho-ribosomal protein S6 (Ser240/244) was also reduced in both SCLC and NSCLC cell lines. Potential synergy was studied between enzastaurin and pemetrexed in SCLC and NSCLC lines and the results were analyzed using the Calcusyn Program by Chou and Talalay. Synergistic (CI <1) to additive interactions were observed between pemetrexed (IC20–70) and enzastaurin (≤ IC50) in both SCLC lines (N = 3) and NSCLC lines (N = 2). Conclusions: We conclude that enzastaruin produces in vitro growth inhibition of SCLC and NSCLC cell lines through inhibition of GSK3β ser9 phosphorylation and has synergistic growth inhibition with pemetrexed. [Table: see text]
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Affiliation(s)
- E. Nakajima
- University of Colorado, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - B. Helfrich
- University of Colorado, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - D. Chan
- University of Colorado, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - Z. Zhang
- University of Colorado, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - F. R. Hirsch
- University of Colorado, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - V. Chen
- University of Colorado, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - D. Ma
- University of Colorado, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
| | - P. A. Bunn
- University of Colorado, Aurora, CO; Eli Lilly and Company, Indianapolis, IN
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Oberschmidt O, Eismann U, Lahn MM, Fleeth J, Lüdtke F, Struck S, Schulz L, Blatter J, Ma D, Hanauske A. In vitro chemosensitivity against enzastaurin correlates with gene expression of IL8 and GSK3-beta. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.13046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
13046 Background: Enzastaurin (E) is an active antitumoral agent which selectively inhibits the β-isoform of protein kinase C (PKC-β). The compound blocks the enzyme’s ATP-binding site and signal transmission is abrogated resulting in the inhibition of neovascularization. The aim of the present study was to correlate gene expression with in vitro chemosensitivity of freshly explanted human tumor specimens. Such correlations in tumors taken directly from patients will help to rationally design subsequent clinical trials. Methods: Soft-agar colony forming assays were performed on freshly biopsied tumor cells exposed to various concentrations of E. Corresponding pieces of tumor specimens were shock-frozen and prepared for RNA isolation and cDNA generation followed by multiplex real-time PCR experiments. Gene expression data were correlated against cloning assay results. Results: Gene expression data of PKC-β1, PKC-β2, IL8RA, IL8RB, IL8, GSK3-β, and TGF-β were correlated against in vitro chemosensitivity pattern of E from 66 samples. After 1h-drug exposure gene expressions in sensitive versus resistant specimens were statistically significant with p = 0.013 for IL8 [median copy number (mcn): 1881 vs. 694; n = 66] and p = 0.012 for GSK3-beta (mcn: 1.6 vs. 7.0; n = 66). No correlation was detected for PKC-β1, PKC-β2, IL8RA, and IL8RB. Detection of TGF-β failed in most samples. Conclusions: Low expression of GSK3-β and high expression of IL8 correlate statistically significantly with increased in vitro sensitivity to E in freshly explanted human tumors. These findings may help direct further clinical development of this compound. No significant financial relationships to disclose.
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Affiliation(s)
- O. Oberschmidt
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - U. Eismann
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - M. M. Lahn
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - J. Fleeth
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - F. Lüdtke
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - S. Struck
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - L. Schulz
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - J. Blatter
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - D. Ma
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
| | - A. Hanauske
- AK St. Georg, Hamburg, Germany; Eli Lilly and Company, Indianapolis, IN
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249
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Chen G, Zhou J, Gao Q, Huang X, Li K, Zhuang L, Huang M, Xu G, Wang S, Lu Y, Ma D. Oncolytic adenovirus-mediated transfer of the antisense chk2 selectively inhibits tumor growth in vitro and in vivo. Cancer Gene Ther 2006; 13:930-9. [PMID: 16741520 DOI: 10.1038/sj.cgt.7700967] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Screening and identifying molecules target to checkpoint pathways has fostered the development of checkpoint-based anticancer strategies. Among these targets, inhibition of chk2 may induce cell death for tumors whose growth depends on enhanced chk2 activity. However, improvement of the potency and specificity of such therapeutics remains a major challenge. To resolve this problem, we constructed M3, a novel recombinant adenovirus with a 27-bp deletion in E1A CR2 region by which to realize tumor-specific replication, and an 829-bp of antisense chk2 fragment inserted into the E3 coding region. In this design, M3 exploited the native adenovirus E3 promoters to express antisense chk2 cDNA in a viral replication-dependent fashion, and preferentially silenced the chk2 gene in tumor cells. In vitro and in vivo assays confirmed that downregulated chk2 expression induced by M3 infection was tumor-specific and virus replication-dependent. Furthermore, systemic administration of M3 combined with a low dose of cisplatin cured 75% (9/12) of orthotopic hepatic carcinoma mouse models that were otherwise resistant to cisplatin. Our results indicated that the upcoming development in this field would improve the antitumor efficacy and maximize the synergistic effect of oncolytic viruses administered with traditional chemotherapy or radiotherapy.
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Affiliation(s)
- G Chen
- Cancer Biology Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
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250
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Song Y, Kong B, Ma D, Qu X, Jiang S. Procaspase-3 enhances the in vitro effect of cytosine deaminase-thymidine kinase disuicide gene therapy on human ovarian cancer. Int J Gynecol Cancer 2006; 16:156-64. [PMID: 16445627 DOI: 10.1111/j.1525-1438.2006.00470.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Because the efficacy of genetic prodrug activation therapy (GPAT) using herpes simplex virus thymidine kinase (tk)/ganciclovir (GCV) or Escherichia coli cytosine deaminase (cd)/5-fluorocytosine (5-FC) is not satisfied in early clinical trials and the mechanism of both the GPATs have been shown to lead to the activation of cell apoptotic pathway, we hypothesized that coexpression of procaspase-3, a central downstream executioner of apoptotic pathways, with cd-tk gene leads to enhanced cell death in ovarian cancer cells in vitro. Following transfection with the vectors encoding cd and tk, 5-FC and GCV treatments lead to greater cell death in procaspase-3-expressing clones of 3AO (3AO-caspase-3) than control cells (3AO-pcDNA3), as well as more rapid activation of caspase-3 and more rapid cleavage of poly (adenosine diphosphate-ribose) polymerase (PARP). There is a greater degree of cell apoptotic rate in the procaspase-3-expressing clones than in control cells following the treatment with cd-tk/5-FC + GCV, and apoptosis is the main cell death form. None of these effects is seen following transfection with a control vector that does not encode tk and cd (pBTdel-279). The results strongly suggest that coexpression of procaspase-3 may lead to a significant enhancement of the efficacy of cd-tk/5-FC + GCV, and this strategy would be a novel and promising approach for the treatment of ovarian cancer.
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Affiliation(s)
- Y Song
- Departments of Obstetrics and Gynecology, Qilu Hospital, Shandong University, Jinan 250012, P.R. China
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