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Following the discovery of monoclonal antibody mAb ; technology, 1 numerous attempts have been made to use mAbs targeted to cancer-associated antigens for the treatment of human cancer. Of many mAbs tested, several were found to be therapeutically active, either as naked antibodies or as immunoconjugates of radionuclides.2-4 Conjugates of antibodies with cytotoxic agents have also been explored as anticancer agents2, 3 as a means of improving the selectivity of cytotoxic drugs by targeting them to antigens preferentially expressed on the surface of malignant cells. Gemtuzumab ozogamicin Mylotarg ; , a conjugate of anti-CD33 humanized monoclonal antibody with a highly cytotoxic DNA-damaging agent calicheamicin, has recently been approved by the FDA as the first drug of this type for clinical treatment of myeloid leukemia.5-7 Immunoconjugates of the highly potent cytotoxic drug maytansine derivative DM1 N2 -deacetyl-N2 - 3-mercapto-1-oxopropyl ; -maytansine ; are also being evaluated as antigen-targeted anticancer agents.8 Maytansine9 is a natural product originally derived from the Ethiopian shrub Maytenus serrata. This drug inhibits tubulin polymerization, 9-11 resulting in mitotic block and cell death. The cytotoxicity of maytansine is 200- to 1000-fold higher than that of anticancer drugs in clinical use that affect tubulin polymerization, such as Vinca alkaloids or taxol. However, clinical trials of maytansine indicated that it lacked a therapeutic window, due to high systemic toxicity. DM1 is 3- to 10-fold more cytotoxic than maytansine, and can be converted into a prodrug by linking it via disulfide bond to a mAb directed against a tumorassociated antigen. Such a conjugate tumor-activated prodrug or TAP ; is not cytotoxic in the blood compartment, since it is activated only upon binding to target cells, with subsequent release of the drug.12 Several mAb-DM1 conjugates have been developed, 13 and, to date, huC242-DM1 and huN901-DM1 have been evaluated in clinical trials. These conjugates were well tolerated, did not induce any detectable immune response, and had a long circulation time.14-16 The murine IgG1 mAb B-B4 binds to a linear epitope between residues 90 to 95 the core protein on human syndecan-1 CD138 ; , a member of the family of transmembrane heparan sulfate proteoglycans.17, 18 This antigen was originally described as a membrane proteoglycan present on cells of epithelial origin, and was subsequently found on hematopoietic cells.19 In the normal human hematopoietic compartment, CD138 expression is restricted to plasma cells17, 20; in particular, CD34 stem and progenitor cells do not express CD138.17 In malignant hematopoiesis, CD138 is highly expressed on the majority of multiple myeloma MM ; cells, many Hodgkin lymphomas with classic Reed-Sternberg cells, 17, 20.
Materials. CMA and ICMA were kindly supplied by Dr. Edward M. Acton of the NIH, Bethesda, MD, dissolved in V.A'-dimethyl formam20C. portant agents used for the chemotherapy of cancer, due to its ide and stored in the dark at " CHL, ethidium bromide, acridine orange, NBP, sodium borohydride, and ultrapure Clostridium perfrinwide spectrum of antitumor activity 1, 2 ; . However, the clinical gens, Escherichaoli, and calf thymus DNAs were obtained from Sigma c usefulness of ADR is limited by its unfavorable side-effects, Chemical Co., St. Louis, MO. CHL was freshly prepared in 1% acidi which include chronic cardiotoxicity 3 ; and myelosuppression fied ethanol. Isolated X-phage DNA was from Boehringer Mannheim, 4 ; , and by its inactivity against some tumors 1, 2 ; . In Dorval, Quebec, Canada and had an approximate molecular weight of attempt to enhance the antitumor activity of ADR, analogues 32, 000, 000. Fischer's medium and horse serum were obtained from in which the C3' amine was replaced with a morpholinyl or a GIBCO Laboratories, Grand Island, NY. |'4C]Thymidine specific ac substituted-morpholinyl ring have been synthesized 5 ; . The tivity, 50 mCi mmol ; and ['H]thymidine specific activity, 50-80 Ci most potent of these analogues, CMA Fig. 1 ; , is 100-1500mmol ; were obtained from New England Nuclear, Boston, MA. Profold more cytotoxic than ADR in vivo 5 ; and in vitro 6-9 ; . As teinase K was from E. Merck, Darmstadt, West Germany, tetrapropylammonium hydroxide was from Eastman Kodak Co., Roches Received 3 10 89; revised 7 5 89; accepted 9 14 89. ter, NY, and the 0.8- m polycarbonate filters were from Nucleopore The costs of publication of this article were defrayed in part by the payment Corp., Pleasanton, CA. of page charges. This article must therefore be hereby marked advertisement in accordance with 18 U.S.C'. Section 1734 solely to indicate this fact. Tissue Culture. LSI78Y murine lymphoma cells were grown in 1Supported by a grant from the Medical Research Council of Canada. suspension culture at 37C, in Fischer's medium supplemented with 2Supported by a studentship from the Manitoba Cancer Treatment and 12% horse serum. Log-phase cells had a doubling time of 12 h Research Foundation. DNA Cross-Linking in L5178Y Cells. Cells were incubated in vitro * To whom requests for reprints should be addressed, at Manitoba Institute of at 37Cwith various concentrations of the drugs for 2 h and then Cell Biology. 100 Olivia Street, Winnipeg, Manitoba, Canada R3E OV9. " * The abbreviations used are; ADR. Adriamycin; CMA, 3'- 3-cyano-4-moranalyzed for DNA-DNA cross-links by the alkaline elution assay, as pholinyl ; -3'-deaminoadriamycin; ICMA, 5-imino-3'- 3-cyano-4-morpholinyl ; 3'-deaminoadriamycin; CHL. chlorambucil; NBP. p-nitrobenzyl pyridine: Tz, previously described 19, 20 ; . The level of cross-linking was calculated as described by Kohn et al. 19 ; . and expressed as rad equivalents. melting temperature; IC!0. concentration of drug required to reduce the change in fluorescence to 50'V of the control. To study the removal of DNA cross-links, L5I78Y cells were incu7031.
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Stevens JG: Functional and molecular analyses of the avirulent wild-type herpes simplex virus type 1 strain K.OS. J Virol 58: 203, 1986. Foster CS, Tsai Y, Monroe JG, Campbell R, Cestari M, Wetzig R, Knipe D, and Greene MI: Genetic studies on murine susceptability to herpes simplex virus. Clin Immunol Immunopathol 40: 313, 1986. Zawatsky R, Hilfenhaus J, Marcucci F, and Kirchner H: Experimental infection of inbred mice with herpes simplex type l Gen Virol 53: 31, 1981. Roizman B and Sears AE: An inquiry into the mechanisms of herpes simplex latency. Ann Rev Microbiol 41: 543, 1987. Gordon YJ: Ocular viral pathogenesis and coevolution. In Biomedical Foundations of Ophthalmology, Vol. 2, Chap. 15, Duane TD, editor. Philadelphia, Harper & Row Publishers, 1986, pp. 1-15.
Detergent-extracted murine melanoma CSPG binds Octyl Sepharose. A ; HPLC-DEAE-purified 35S-CSPG was resuspended in Octyl Sepharose buffer 4.0 M Guanidine HCL, 20 mM Tris, pH 6.8 ; and applied to a 5-ml Octyl Sepharose column at a flow rate of 0.5 ml min . Hydrophobic CSPG were then eluted with a linear gradient of Triton X-100 from 0 to 0.5 % in Octyl Sepharose buffer. Fractions of 2 ml each were analyzed for 35S radioactivity open squares ; by liquid scintillation and percent Triton X-100 by absorbance at 280 not solid diamonds ; . B ; HPLC-DEAE-purified 35 S-CSPG was briefly digested with trypsin before Octyl Sepharose chromatography. surface CSPG in type I collagen-mediated melanoma cell motility and invasion. By utilizing a solid phase binding assay, containing type I collagen coated onto microtiter wells, we determined that DEAE-HPLC-purified CSPG bound to type I collagen in a concentration dependent and saturable fashion data not shown ; . HPLC-DEAE-purified CSPG also bound to a type I collagen affinity column in the presence of 0.5% CHAPS and was eluted from the column by 0.4 M NaCI Fig. 7 a ; . The binding of 35S CSPG was specific to type I collagen since it failed to bind to an affinity column prepared without type I collagen . To further evaluate the mechanism by which CSPG bound to type I collagen, chondroitin sulfate released from the protein core by alkaline -elimination and treated with nitrous acid to remove any contaminating heparan sulfate, was applied to the type I col.
Semapimod induces clinical remission in severe Crohn's disease. J Immunol 2005; 175 4 ; : 22932300 AMC ; 509. Luedeking A, Van Noorden CJF, Koehler A. Identification and characterisation of a multidrug resistance-related protein mRNA in the blue mussel Mytilus edulis. Mar Ecol-Prog Ser 2005; 286: 167175 AMC ; 510. Luiten RM, Kueter EW, Mooi W, Gallee MP, Rankin EM, Gerritsen WR, Clift SM, Nooijen WJ, Weder P, van de Kasteele WF, Sein J, van den Berk PC, Nieweg OE, Berns AM, Spits H, de Gast GC. Immunogenicity, Including Vitiligo, and Feasibility of Vaccination With Autologous GM-CSFTransduced Tumor Cells in Metastatic Melanoma Patients. J Clin Oncol 2005; 23: 8978-91 NKI ; 511. Luppino FS, Pameijer FA, Balm AJM. Radiology quiz case 2. Laryngeal plasmacytoma in a patient with known multiple myeloma MM ; . Arch Otolaryngol Head Neck Surg 2005; 131: 74 NKI ; 512. Lyons JM, Ito JI, Morre SA. The influence of vaginally applied imiquimod on the course of Chlamydia trachomatis serovar D infection in a murine model. Infect Dis Obstet Gynecol 2005; 13 1 ; : 1-3 VUmc ; 513. Lyons JM, Ito JI, Pena AS, Morre SA. Differences in growth characteristics and elementary body associated cytotoxicity between Chlamydia trachomatis oculogenital serovars D and H and Chlamydia muridarum. J Clin Pathol 2005; 58 4 ; : 397-401 VUmc ; 514. Lyons JM, Morre SA, Airo-Brown LP, Pena AS, Ito JI. Acquired homotypic and heterotypic immunity against oculogenital Chlamydia trachomatis serovars following female genital tract infection in mice. BMC Infect Dis 2005; 5: 105 VUmc ; 515. Lyons JM, Morre SA, Airo-Brown LP, Pena AS, Ito JI. Comparison of multiple genital tract infections with Chlamydia trachomatis in different strains of female mice. J Microbiol Immunol Infect 2005; 38 6 ; : 383-393 VUmc ; 516. Ma X, Ziel-van der Made AC, Autar B, van der Korput HA, Vermeij M, van Duijn P, Cleutjens KB, de Krijger R, Krimpenfort P, Berns A, van der Kwast TH, Trapman J. Targeted biallelic inactivation of Pten in the mouse prostate leads to prostate cancer accompanied by increased epithelial cell proliferation but not by reduced apoptosis. Cancer Res 2005; 65: 5730-9 NKI ; 517. Mackus WJM, Kater AP, Grummels A, Evers LM, Hooijbrink B, Kramer MHH, De Castro S de, Kipps TJ, Van Lier RAW, Van Oers MHJ, Eldering EF. Chronic lymphocytic leukemia cells display p53dependent drug-induced Puma upregulation. Leukemia 2005; 19 3 ; : 427-434 AMC ; 518. Madalinska JB, Hollenstein J, Bleiker E, Van Beurden M, Valdimarsdottir HB, Massuger LF, Gaarenstroom KN, Mourits MJ, Verheijen RH, van.
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Protoplasts from singly and doubly injected leaves Protoplasts were prepared in the usual way from systemically infected leaves of Nicotiana benthamiana plants inoculated I2 days previously and kept in a controlled environment 25 C for Iz h per day in light of intensity Io8oo lux, then 2o C for I2 h in darkness ; . Plants infected singly with TRV-CAM were almost symptomless, those with only RRV-E had line patterns on the first systemically infected leaves and those with both viruses had systemic ringspots, mottling and leaf rugosity not confined to the first systemically infected leaves. When protoplasts were prepared and immediately treated with fluorescent antibody, 9I % of those from leaves singly infected with TRV-CAM, and 95 % of those from doubly infected leaves, stained with TRV-CAM antibody. RRV-E antibody gave weak generalized staining of many protoplasts from singly infected plants whereas 45 % of protoplasts from doubly infected plants contained antigen aggregates. These results show that RRV antigen aggregates are produced in intact plants as well as in inoculated protoplasts, and that the phenomenon occurs in at least two species, N. benthamiana and N. tabacum. In some experiments, a proportion of the protoplasts from doubly infected leaves contained granules that stained with antibody to TRV-CAM, instead of having the usual more reticulate distribution of stain; this proportion was the same as that in which RRV antigen aggregates occurred. In further experiments, protoplasts prepared from N. benthamiana plants infected with one virus were inoculated with the other, and incubated in the usual way before staining with fluorescent antibody Fig. I ; . Of the protoplasts superinoculated with TRV-CAM nearly half became infected, and many of these developed RRV antigen aggregates Table 8; Fig. I h ; . the protoplasts superinoculated with RRV-E, about half developed antigen aggregates Fig. I d ; , suggesting that the protoplasts infected with TRV-CAM were about as susceptible to infection with RRV-E as protoplasts from healthy Xanthi tobacco leaves. Formation of mixed virus aggregates in vitro A possibility not tested in the foregoing experiments is that RRV and TRV-CAM particles have a mutual affinity and so RRV assumes a distribution more like that of TRV-CAM in doubly infected cells or protoplasts. When purified preparations of TRV-CAM and RRV-E each at 4o #g ml ; o'06 K-phosphate buffer at pH 7"o were mixed, turbidity increased about m-fold, most of the increase occurring within I min Fig. 2 ; . The turbidity increased or decreased with increase or decrease in concentration of either virus in the mixture and is considered to be caused by formation of mixed virus aggregates. Electron microscopy of such mixtures revealed aggregates of virus particles, and some of the aggregates produced in mixtures containing each virus at Io to were small enough for it to be seen that they contained both viruses, in a ratio of 2 to RRV-E particles to I TRV-CAM particle Fig. 3 ; . RRV-E particles were associated with ends and sides of TRV-CAM particles. The aggregates contained both long and short TRV-CAM particles in the ratio of about I : 3.
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DMD #12005 Discussion Several studies have examined the drug induced transcriptional regulation of the human CYP2C subfamily of P450 enzymes by CAR and PXR; however, relatively little is known of the regulation of their murine counterparts. Presently, a total of fifteen murine Cyp2c genes have been identified within a cluster on chromosome 19 Nelson et al., 2004; Wang et al., 2004b ; . Within this large P450 gene subfamily, only the Cyp2c29 gene has been shown to be drug inducible thus far Jackson et al., 2004 ; . Herein, we show that hepatic CYP2C37 mRNA is induced by phenobarbital and phenytoin, becoming the second known drug inducible murine Cyp2c gene. We demonstrate using CAR-null mice that the induction of CYP2C37 mRNA is primarily CAR-dependent. Additionally, we identify a functional DR-4 CAR-RE at -2791 bp from the translation start site of the Cyp2c37 gene. Alignments of the 5'-flanking regions of the murine Cyp2c genes indicate that particular subsets of Cyp2c members including Cyp2c29, Cyp2c39, and Cyp2c38 share high sequence homology; however, as a group the 5'-flanking regions are not highly conserved. The alignments show that the PHREM is exclusive to Cyp2c29 and is not conserved in any of the other corresponding 5'flanking regions. These findings suggested that induction of hepatic CYP2C37 mRNA is mediated by an alternative drug responsive region. A number of putative CAR binding sites were identified; however, only the putative DR-4 CARRE -2791 ; bound mCAR and mutagenesis of this site indicated that it is necessary for mCAR transactivation. These results are consistent with our and mycostatin.
This is an interesting study showing that in vitro assays using human PBMCs can partially translate to murine models of colitis giving an indication of the level of expected protection of this particular model of colitis using IL-10 IL-12 ratios. It would be interesting to discover whether this held out if colitis was induced before administration of the probiotic perhaps a more physiological approach for therapy ; . However, this does offer some insight into prophylactic approaches for managing patients in remission.
Murine brain cells transformed enzymatically DHA to 17R series of hydroxy DHAs HDHAs ; that, in turn, is converted enzymatically by PMNs to di- and tri-hydroxy containing docosanoids [77]. Similar small molecular weight compounds similar to HDHAs ; are generated from AA and EPA. Thus, 15R-hydroxy containing compounds are formed from AA, 18R series from EPA, and 17R-hydroxy series from DHA that have potent anti-inflammatory actions and induce resolution of the inflammatory process and hence are called "resolvins" see Fig. 2 ; . Resolvins inhibited cytokine generation, leukocyte recruitment, leukocyte diapedesis, and exudate formation. AA, EPA, and DHA-derived resolvins from acetylated COX-2 are formed due to communication between endothelial cells and PMNs. Resolvins inhibit brain ischemia-reperfusion injury [78]. Thus, lipoxins and resolvins formed from AA, EPA, and DHA have cardio-protective, neuroprotective, and other cytoprotective actions. Of the several 17-hydroxy-containing bioactive mediators derived from DHA that were termed docosatrienes and 17S series resolvins, 10, 17S-dihydroxydocosatriene termed as neuroprotectin D1 NPD1 ; that reduced infiltration of PMNs, showed anti-inflammatory and neuroprotective properties [78, 79]. NPD1 inhibited oxidative stress-induced and mysoline.
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Cox's multivariate analysis of 251 patients with a complete set of data included variables that significantly predicted univariate survival, except pT category because it includes Clark's level and tumor thickness. Tumor thickness P 0.0008 ; and bleeding P 0.0411 ; were associated with short OS. Reduced CD44 level was an independent predictor of short RFS P 0.0308 ; . Other independent predictors of short RFS were tumor thickness P 0.001 ; and bleeding P 0.0346 ; Table 4 and nadolol.
20. Axelrad MA, Kisilevsky R, Willmer J, Chen SJ, Skinner M. 1982 ; Further characterization of amyloid-enhancing factor. Lab. Invest. 47: 139146. 21. Kindy MS, de Beer FC. 1999 ; A mouse model for serum amyloid A amyloidosis. Meth. Enzymol. 309: 701716. 22. De Beer MC, de Beer FC, McCubbin WD, Kay CM, Kindy MS. 1993 ; Structural prerequisites for amyloid A fibril formation. J. Biol. Chem. 268: 2060620612. 23. Provencher S, Glockner J. 1981 ; Estimation of globular protein secondary structure from circular dichroism. Biochemistry 20: 3337. 24. Fragmin During Instability in Coronary Artery Disease FRISC ; Study Group. 1996 ; Low-molecular-weight heparin during instability in coronary artery disease. Lancet 347: 561568 1996 ; . 25. Cohen M, Demers C, Gurfinkel EP, et al. 1997 ; A comparison of low-molecular-weight heparin with unfractionated heparin for unstable coronary artery disease. N. Engl. J. Med. 337: 447 452. McCubbin WD, Kay CM, Narindrasorasak S, Kisilevsky R. 1988 ; Circular-dichroism studies on two murine serum amyloid A proteins. Biochem. J. 256: 775783. 27. Ancsin JB, Kisilevsky R. 1999 ; The heparin heparan sulfatebinding site on apo-serum amyloid A. implications for the therapeutic intervention of amyloidosis. J. Biol. Chem. 274: 71727181. 28. Narindrasorasak S, Lowery D, Gonzalez-De-Whitt P, Poorman RA, Greenberg B, Kisilevsky R. 1991 ; High affinity interactions between the Alzheimer's beta-amyloid precursor proteins and the basement membrane form of heparan sulfate proteoglycan. J. Biol. Chem. 266: 1287812883. 29. Clarris HJ, Cappai R, Heffernan D, Bryreuther K, Masters CL, Small DH. 1997 ; Identification of heparin-binding domains in the amyloid precursor protein of Alzheimer's disease by deletion mutagenesis and peptide mapping. J. Neurochem. 68: 11641172. 30. Castillo GM, Cummings JA, Yang W, et al. 1998 ; Sulfate content and specific glycosaminoglycan backbone of perlecan are critical for perlecan's enhancement of islet amyloid polypeptide amylin ; fibril formation. Diabetes 47: 612 620. Inoue S, Hultin PG, Szarek WA, Kisilevsky R. 1996 ; Effect of poly vinylsulfonate ; on murine AA amyloid: a highresolution ultrastructural study. Lab. Invest. 74: 1081 1090. Leveugle B, Scanameo A, Ding W, Fillit H. 1994 ; Binding of heparan sulfate proteoglycan to -amyloid peptide: inhibition by potentially therapeutic polysulfated compounds. Neuroreport 5: 13891392. 33. Castillo GM, Lukito W, Wight TN, Snow AD. 1999 ; The sulfate moieties of glycosaminoglycans are critical for the enhancement of beta-amyloid protein fibril formation. J. Neurochem. 72: 1681 1687. McLaurin J, Franklin T, Zhang X, Deng J, Fraser PE. 1999 ; Interactions of Alzheimer amyloid-beta peptides with glycosaminoglycans effects on nucleation and growth. Eur. J. Biochem. 266: 11011110. 35. Watson DJ, Lander AD, Selkoe DJ. 1997 ; Heparin-binding properties of the amyloidogenic peptides A and amylin. J. Biol. Chem. 272: 3161731624. 36. Shuvaev VV, Siest G. 2000 ; Heparin specifically inhibits binding of apolipoprotein E to amyloid -peptide. Neurosci. Lett. 280: 131134. 37. Gabizon R, Meiner Z, Halimi M, Ben-Sasson SA. 1993 ; Heparin-like molecules bind differentially to prion-proteins and changes their intracellular metabolic fate. J. Cell. Physiol. 157: 319325. 38. Leveugle B, Ding W, Laurence F, et al. 1998 ; Heparin oligosaccharides that pass the blood-brain barrier inhibit -amyloid precursor protein secretion and heparin binding to -amyloid peptide. J. Neurochem. 70: 736744.
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FIG. 2. Expression of murine Pgp in erg6 mutant yeast strains. Protein extracts from erg6 mutant cells were subjected to SDS-polyacrylamide gel electrophoresis, transferred to a nitrocellulose membrane, and probed with the Pgp-specific monoclonal antibody C219. Legend: WT, erg6 parent strain; cpr1, erg6 cyclophilin A mutant; fpr1, erg6 FKBP12 mutant; cnb1, erg6 calcineurin B mutant Table I ; . Strains were transformed with the murine mdr3 gene expression plasmid pVTMDR3S ; or the control plasmid pVT and nafcillin.
| Murine cell lineDocumented that decreased expression levels of adiponectin and leptin were associated with insulin resistance in murine models of lipodystrophy 35 ; . Of interest, insulin resistance was completely reversed by a combination of physiological doses of adiponectin and leptin but only partially by either adiponectin or leptin alone 35 ; , which suggests that reduced levels of adiponectin and leptin play critical roles in the development of insulin resistance in a lack of adipose tissue. PPAR 2 mice provide a model for studying the role of PPAR 2 in the regulation of resistin secretion from adipose tissue in vivo. Initial studies have documented that resistin induces insulin resistance, and that the suppressive effect of TZDs on resistin secretion may contribute to the insulinsensitizing effect of this class of drugs 36 ; . However, our data demonstrate that expression levels of resistin were reduced in the WAT of PPAR 2 mice. This finding agrees that resistin like lipoprotein lipase, leptin, and adipsin ; tracks the differentiation of adipose tissue. Indeed, the activation of PPAR induces adipogenesis, which leads to the induction of resistin 37 ; . Of interest, reduced levels of resistin mRNA in the WAT of obese and diabetic mice, including ob ob, db db, and KKAy mice, have been reported 38, 39 ; . Taken together, these results indicate that the role of PPAR in the regulation of resistin expression is more complex than was originally believed. The underlying molecular mechanism remains to be further explored. Although changes in the phenotype, including reduction of fat mass, less lipid accumulation, and decreased adipogenic gene.
That is rapidly converted to prostaglandin PGI2, PGF2 , PGD2, and thromboxane A2. Prostaglandin I2 can activate PPAR 57, 58 ; . Thus, colon cancer cells can have stimulation of PPAR from two directions, APC mutations causing hyperactivity of -catenin TCF4 and high levels of COX-2. Interestingly, when COX-2 knockout mice were mated with Mim mice, the number and size of intestinal polyps markedly decreased consistent with COX-2, playing an important role in promoting the development of tumors in the APC mutant genetic background 59 61 ; . Likewise, treatment of Mim mice with selective COX-2 inhibitors can reduce the number of polyps that develop 59 ; . Clearly, additional studies are required to determine the role of ligands of PPAR in both the prevention and treatment of colon cancer. Also, the importance of PPAR in colon cancer requires additional investigation. Breast Cancer Breast cancer is one of the most frequent malignancies in females, with one woman in eight or nine developing breast cancer in her life. Breast cancer cells often express prominent levels of PPAR . Table 3 provides several salient observations concerning breast cancer and PPAR . A couple of studies have shown that 10 610 5 M TZDs can inhibit proliferation and induce differentiation-like changes in breast cancer cell lines both in vitro and growing in nude mice 15, 62 ; . Additional studies have found that the combination of a retinoid with a PPAR ligand synergistically inhibited the growth and induced apoptosis of a series of breast cancer cell lines both in vitro and in xenografts growing in nude mice 62 ; . This was associated with a decreased number of cells in S phase and an increased percentage of cells in G0-G1. Up to 30 40% of the breast cancer cells cultured with a TZD and a retinoid became apoptotic with a fall in their levels of bcl-2. This apoptosis could be overcome by forced overexpression of bcl-2 in these cells 62 ; . In vivo experiments have shown that administration of a PPAR ligand GW7845 ; inhibited the development of carcinogen-induced breast cancer in rats 63 ; . Another in vivo study showed troglitazone also prevented carcinogen 7, 12-dimethylbenz a ; anthracene ; -induced transformation of murine breast tissues 64 ; . Furthermore, the addition of a retinoid to the PPAR ligand greatly enhanced their abilities to prevent the transformation of the breasts 64 ; . Of interest, mice who have a heterozygous germ-line deletion of PPAR PPAR ; have a greater susceptibility to develop breast and ovarian cancers after their exposure to 7, 12-dimethylbenz a ; anthracene, suggesting and naloxone.
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Of the PE2. The secondary plating efficiency measured using the pooled colony technique described The cells were harvested from primary colonies, pooled, replated of the 20 culture in microwells same cells composition were per method. counted I 0 cells Blast at a cell used after plated. cells were density for 7-day of primary incubation. l0 per well PE2 cultures and murine.
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Cells did not produce detectable amounts of cytokine data not shown ; . Despite some differences at individual time-points, cytokine production from perforin-deficient mice was very similar to that of control C57BL mice. The absence of perforin has been shown to have little effect on the clearance of vesicular stomatitis virus, Semliki Forest virus Ka$ gi et al., 1995 ; or influenza virus R. A. Tripp, S. R. Sarawar, D. Kagi, H. Hengartner & P. C. Doherty, unpublished $ results ; . In contrast, lymphocytic choriomeningitis virus, which establishes a noncytopathic persistent infection, cannot be cleared in perforin-deficient mice. MHV-68 infection is cytopathic in the lung, but the virus establishes a latent noncytopathic infection in B lymphocytes. As we have shown, perforin is not required to control MHV-68 infection in either lung or lymphoid tissue, demonstrating that perforin-dependent T cell effector functions are not required for immunity to all viruses with noncytopathic components to their life cycle. The role of the FasFas ligand route of CTL killing was not addressed in this work, but it was not responsible for the CD3-dependent killing of target cells by perforin-deficient effectors. CD8 + T cells may control the infection through the secretion of soluble factors such as chemokines or cytokines. This is thought to be the method by which CD4 + T cells control influenza virus infection in -microglobulin-deficient # mice Topham et al., 1996 ; as there is no requirement for direct contact between infected epithelial cells and immune CD4 + T cells. Whether this is also true for CD8 + T cells is unclear. These cells do require direct antigen presentation by infected respiratory epithelial cells Hou & Doherty, 1995 ; . However, this could lead to the release of soluble factors in addition to direct cell killing. CTLs have been shown to act in this manner in a mouse model of hepatitis B virus infection Guidotti et al., 1996 ; , where the secretion of IFN- and TNF- activates intracellular virocidal pathways without killing infected cells. It has recently been demonstrated that CD8 T cell immunity to murine rotavirus does not involve the perforin, Fas or IFN- effector functions, so it is clear that additional antiviral mechanisms are present Franco et al., 1997 ; . The precise mechanism s ; responsible for the action of MHV-68-specific CTLs is unclear, and it is possible that the mechanism used to counter the lytic infection in the lung is different to that used in the control of latently infected B lymphocytes.
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P171-T WHOLE GENOME EXPRESSION ANALYSIS OF MG-63 OSTEOBLAST-LIKE CELL LINE UNDER DIFFERENT PHISIOLOGICAL STIMULI M. Mattioli * 1, D. Finzi1, C. Villa1, P. Tarroni1 1 Target Biology, Axxam Srl, Milan, Italy P174-T EFFECTS OF GLUCOCORTICOIDS ON OSTEOCYTIC GENE EXPRESSION IN VIVO AND IN VITRO M. K. A. Nars * 1, G. Gu1, T. Hentunen1, K. H. Vnnen1 1 Department of Anatomy, Institute of Biomedicine, University of Turku, Turku, Finland P177-T ZOLEDRONATE POTENTLY INHIBITS THE GROWTH, FUNCTION AND SURVIVAL OF NORMAL RAT OSTEOBLASTS I. R. Orriss * 1, J. C. Utting1, M. L. Key1, A. Brandao-Burch1, K. Colston2, T. R. Arnett1 1 Anatomy and Developmental Biology, University College London, 2Oncology, Gaestoenterology, Endocrinology and Metabolism, St George's Hospital Medical School, London, United Kingdom P180-T HETEROTOPIC OSSIFICATION IN A RADIAL FOREARM FLAP: CASE STUDY E. Prempeh * 1, F. Peart2 1 Plastic Surgery, Selly Oak Hospital, Selly Oak, United Kingdom, 2, P183-T IMMUNOHISTOCHEMICAL STUDIES DEMONSTRATE THAT GAS6 AND AXL ARE EXPRESSED BY OSTEOBLASTS AND GROWTH PLATE CHONDROCYTES L. C. Ronaldson * 1, A. E. Canfield2, C. Farquharson1 1 Gene Function and Development, Roslin Institute, Midlothian, 2Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom P186-T EFFECTS OF RALOXIFENE AND ITS INTERACTION WITH HUMAN PTH ON HUMAN PRIMARY OSTEOBLASTIC CELLS B. Frediani * 1, A. Spreafico1, C. Capperucci1, F. Baldi1, M. Galeazzi1, R. Marcolongo1 1 Department of Clinical Medicine and Immunological Sciences Division of Rheumatology, University of Siena, Siena, Italy P189-T CELLULAR SCREENING OF BONE-RELATED DISEASES IN MICE F. Thiele * 1, T. S. Lisse1, G. K. H. Przemeck1, H. Fuchs1, V. Gailus-Durner1, M. M. Hrab de Angelis1 1 Institute of Experimental Genetics, GSF-National Research Center for Environment and Health, NeuherbergMunich, Germany P192-T BMP-6 REGULATES GLUCOSE AND BONE METABOLISM VIA FATTY ACID AND INSULIN GROWTH FACTOR I SYNTHESIS I. Orlic * 1, P. Simic1, S. Vukicevic1 1 Department of Anatomy, Medical School, Zagreb, Croatia P196-T THE REGULATION AND ENZYMATIC BASIS OF BONE RESRPTION BY HUMAN OSTEOCLASTS K. Fuller1, B. Kirstein1, T. J. Chambers * 1 Cellular Pathology, St George's, University of London, London, United Kingdom P199-T THE LEVELS OF BONE TURNOVER MARKERS IN PERIPUBERTAL GIRLS K. M. Fagerlund * 1, M. Lehtonen-Veromaa2, T. Mttnen3, H. K. Vnnen4, J. M. Halleen5 1 Institute of Biomedicine, Department of Anatomy, University of Turku, Finland, University of Turku, 2Paavo Nurmi Center, Sport and Exercise Medicine Unit, Department of Physiology, University of Turku, Finland, 3 Department of Medicine, Turku University Central Hospital, Finland, 4Institute of Biomedicine, Department of Anatomy, University of Turku, Finland, 5Institute of Biomedicine, Department of Anatomy, University of Turku, Finland, Pharmatest Services Ltd, Turku, Finland P202-T RELEASE OF INFLAMMATORY CYTOKINES BY MONONUCLEAR CELLS FROM PERIPHERAL BLOOD UPON EXPOSURE TO METAL IONS E. Hirzel1, K. Jost-Albrecht1, W. Hofstetter * 1 Department Clinical Research, University of Berne, Berne, Switzerland P205-T EFFECT OF THALIDOMIDE ON THE FORMATION OF MURINE OSTEOCLASTS IN VITRO I. Kaczmarczyk-Sedlak1, J. Folwarczna * 1, L. Sliwinski1, H. I. Trzeciak1 1 Department of Pharmacology, Medical University of Silesia, Sosnowiec, Poland and namenda.
Murine cytomegalovirus stimulates cellular
Unsafe abortion is a major cause of mortality among women in India, accounting for 12% of all maternal deaths. In developing countries, up to 200, 000 women die annually of complications after illegal abortion. With liberalization, the demand for some kind of method which does not require any surgical intervention especially in nulliparous women without a child ; , is increasing and likely to go up still further. The Mifepristone, Misoprostol abortion, consisting of oral pills is potentially simple and safe for use in less - developed countries and muse.
Recipient mice. This will deplete recipient mouse bone marrow of ATase, but donor cells containing the mutant ATase will be resistant to benzyguanine depletion and repair DNA damage. This method will therefore give donor cells an advantage of recipient cells and potentially enable delivery of chemotherapy after low intensity transplantation. Initial experiments indicate that Temozolomide given 21 days post transplant enabled donor chimerism to increase from a baseline of 15% to 80%. We have therefore, at least in principle, been able to show that donor cells may be given a selective advantage, and now aim to ascertain whether this process is effective in the eradication of xenografted donor cells in recipient mice. This work has been undertaken in collaboration with Dr Lez Fairbarin in the Gene Therapy Group. Elucidation of novel stem cell markers The future of research in stem cell biology and the use of stem cells for therapeutic purposes are critically dependent on isolating specific stem cell compartments from a heterogeneous cell population. Furthermore, to define rare pluripotent stem cells, it would be advantageous to define cell surface markers in their physiological state, i.e. in vivo. We aimed to isolate a panel of single chain Fv scFv ; antibodies that specifically bind to G-CSF mobilised peripheral blood progenitor cells. Phage display provides a powerful technique to derive antibodies of human origin, without the prerequisite of prior characterisation of the precise nature of their antigenic target. A combination of three different phage display libraries was used to maximise the initial repertoire comprising 1010 scFv clones. One initial selection was performed in vitro to enrich for phage clones binding to lineage negative, Sca 1 positive haematopoietic progenitor cells HPC ; . However, subsequent rounds were performed in vivo, in a murine model of G-CSF mobilisation. The phage libraries were injected intravenously into mice pre-treated with G-CSF, in order that the simultaneous exposure of phage to target HPC, within their different anatomical and naratriptan.
Murine pregnancy
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