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Cao Z, Li S, Wang Y, Ma M, Chen P. Effect of acetylated soyabean peptides on rumen
fermentation and nitrogen metabolism in sheep. JOURNAL OF ANIMAL AND FEED SCIENCES 2007. [DOI: 10.22358/jafs/74476/2007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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202
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Zhang Y, He F, Li S, Cao Z, Lv S, Lu J. A multicenter, prospective, randomized, open comparator study on the treatment of ovulatory menorrhagia with tranexamic acid and norethisterone in mainland China. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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203
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Cai X, Li C, Du G, Cao Z. Protective effects of baicalin on ligature-induced periodontitis in rats. J Periodontal Res 2007; 43:14-21. [DOI: 10.1111/j.1600-0765.2007.00989.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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204
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Dybvig K, Cao Z, French CT, Yu H. Evidence for type III restriction and modification systems in Mycoplasma pulmonis. J Bacteriol 2007; 189:2197-202. [PMID: 17209015 PMCID: PMC1899405 DOI: 10.1128/jb.01669-06] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2006] [Accepted: 12/26/2006] [Indexed: 11/20/2022] Open
Abstract
Mycoplasma pulmonis possesses a cassette of genes that are predicted to code for type III restriction and modification (R-M) enzymes. Transposon disruption of a gene predicted to code for the endonuclease subunit of the enzyme resulted in loss of R-M activity. Genomic data indicate that the cassette was acquired by horizontal gene transfer and possibly located on a mobile element.
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Cao Z, Wang W, Xiao X, Chen K, Liang X, Yu D. High-Level Expression and Purification of an Analgesic Peptide from Buthus martensii Karch. Protein Pept Lett 2007; 14:247-51. [PMID: 17346228 DOI: 10.2174/092986607780090883] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BmK AngM1, a scorpion peptide isolated from Buthus martensii Karch was reported to exhibit potential analgesic effect. But the relative low content of this toxin in crude venom limits its further characterization. In this study, we constructed an expression vector and transformed into E.coli. The BmK AngM1 was expressed as a fusion protein in the soluble fraction and was purified by Nickel affinity chromatography. Subsequently, the purified fusion protein was cleaved by enterokinase and was further purified by reverse-phase HPLC. We purified 25 mg recombinant BmK AngM1 (rBmK AngM1) from 1 L bacterial culture. The molecular weight of rBmK AngM1 determined by ESI-MS was 7240.4 Da which was the expected size for correctly processed. Analgesic bioassay studies of rBmK AngM1 exhibited its potential analgesic effect comparable to that of the natural BmK AngM1 peptide.
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Chai A, Cao Z, Chen H. Monte carlo method study of terahertz pulse propagation in biological tissue. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2007; 2005:1408-10. [PMID: 17282462 DOI: 10.1109/iembs.2005.1616693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The terahertz pulse (THz pulse) propagation in biological tissue is simulated by Monte Carlo method (MCM). The migratory route of THz pulse in the tissue is presented. The computation model is based on the assumption that the refraction indexes of tissue and air are mismatch and both surfaces of the tissue have the reflection effect for THz pulse.
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Cao Z, Wang Y, McAdory BS, Kemp MD, Ivy MT, Newkirk RF, Townsel JG. Identification and characterization of syntaxin 1 antisense variants in Limulus polyphemus. Cell Mol Neurobiol 2006; 26:53-66. [PMID: 16633901 DOI: 10.1007/s10571-006-8979-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2005] [Accepted: 10/05/2005] [Indexed: 11/26/2022]
Abstract
1.A Limulus SMART(TM) cDNA library screening resulted in the cloning of four syntaxin 1 homologs (referred to as Limulus syntaxin [Lim-syn] 1A, 1B, 1C, and 1D) (Wang, Y., Cao, Z., Xu, W., Kemp, M. D., McAdory, B. S., Newkirk, R. F., Ivy, M. T., and Townsel, J. G. (2004). Gene 326:189-199) and two novel intron-retaining syntaxin 1-like variants, designated Limulus syntaxin variant [Lim-synV] 1A/1C and Lim-synV 1B/1D. 2.The variants exhibited high amino acid sequence identity with the four syntaxin 1 homologs. Specifically, Lim-synV 1A/1C and Lim-synV 1B/1D were homologous to Lim-syn 1A/1C and Lim-syn 1B/1D, respectively. Surprisingly, both Lim-synV 1A/1C and 1B/1D are unusual in that each has a poly A+ tail, an intron, and the common splice motif "GT-AG" at the intron-exon boundary. Exons one and two on the complementary transcript of Lim-synV 1B/1D are separated by a 150 bp intron beginning at #95/96 of the predicted sequences for Lim-syn 1B and 1D, respectively. 3. In contrast, examination of the approximately 3.17 kb Lim-synV 1A/1C clone indicated the inclusion of an insert of 1120 base pairs (bp) beginning at codon #37/38 of the predicted Lim-syn 1A and 1C cDNAs' open reading frames (ORFs). Further, the intron sequence of Lim-synV 1A/C contained multiple stop codons and showed no significant homology to other known sequences as determined by a search of the GenBank database. Thus, the focus of this paper will be Lim-synV 1B/D exclusively. 4. To substantiate that an intron is retained in the full-length mRNA, two types of syntaxin cDNA fragments for Lim-syn 1B/D were generated by RT-PCR and analyzed on Northern blots. The products generated were a mixture of intron-retaining, as well as intron-spliced products. The syntaxin-like variants that retained the intron presumably are derived from a mRNA molecule that has not undergone splicing.5. Although the significance of such intron-containing mRNAs in Limulus has not yet been elucidated, future studies of such variants may serve to broaden our knowledge concerning established splicing mechanisms as well as to focus attention on nonconventional concepts about gene product regulation.
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Cao Z, Li C, Zhu G. MMP-1 promoter gene polymorphism and susceptibility to chronic periodontitis in a Chinese population. ACTA ACUST UNITED AC 2006; 68:38-43. [PMID: 16774538 DOI: 10.1111/j.1399-0039.2006.00615.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A single nucleotide polymorphism in the promoter region of -1607 bp of the human MMP-1 gene has been found to be associated with an increased risk of various inflammatory diseases and cancer metastasis. This study aimed to evaluate the association between the MMP-1 promoter gene polymorphism and chronic periodontitis susceptibility and/or severity in a Chinese population. Genomic DNA was obtained from whole blood samples in 60 Chinese subjects with chronic periodontitis and 50 periodontally healthy subjects as controls. MMP-1 promoter fragment was amplified by polymerase chain reaction, and the polymorphism was analyzed by restriction endonuclease cleavage. In the control subjects, the 2G allele was observed a frequency of 49%, while in severely diseased patients, the 2G allele was seen in 73.4%. The individuals with the 2G allele seem to be approximately three times at greater risk for developing the severe chronic periodontitis (chi(2) = 12.148, P = 0.000). The genotype of 2G/2G was found in 58.5% of the severe periodontitis and 24% of the control group (chi(2) = 11.779, P = 0.003). This study suggests that a single nucleotide polymorphism in the MMP-1 promoter region of -1607 bp may be associated with severe chronic periodontitis in a Chinese population.
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Liu J, Drummond JR, Jones DBA, Cao Z, Bremer H, Kar J, Zou J, Nichitiu F, Gille JC. Large horizontal gradients in atmospheric CO at the synoptic scale as seen by spaceborne Measurements of Pollution in the Troposphere. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006076] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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210
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Zhou L, Isenberg JS, Cao Z, Roberts DD. Type I collagen is a molecular target for inhibition of angiogenesis by endogenous thrombospondin-1. Oncogene 2005; 25:536-45. [PMID: 16247480 DOI: 10.1038/sj.onc.1209069] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Three-dimensional explant cultures of muscle tissue were used to characterize secreted proteins regulated by endogenous levels of the angiogenesis modulator thrombospondin (TSP)-1. Explants from TSP1 null mice exhibit enhanced neovascularization associated with increased endothelial outgrowth but decreased outgrowth of perivascular smooth muscle cells . The absence of endogenous TSP1 did not diminish activation of latent transforming growth factor-beta and moderately decreased matrix metalloproteinase levels. However, significant changes in other secreted proteins were observed. Endogenous TSP1 decreased mRNA levels for collagens Ialpha1, Ialpha2, and IIIalpha1 and laminin alpha4 and increased collagen IValpha1 mRNA expression. Endogenous TSP1 also decreased the level of type I collagen protein produced by the vascular outgrowths. Collagens Ialpha1, Ialpha2, and IIIalpha1 are known tumor endothelial markers, suggesting that TSP1 coordinately regulates a set of extracellular matrix genes that reverse the angiogenic switch. Suppression of collagen Ialpha1 or Ialpha2 mRNAs using antisense morpholinos inhibited outgrowth in TSP1 null explants and proliferation of TSP1 null endothelial cells, indicating that type I collagen synthesis is limiting for this neovascularization response.
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211
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Cao Z, Gourlay L, Isaacs N, Lindsay G. Structure-function analysis of a novel mitochondrial antioxidant protein. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305091774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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212
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Peng SJ, Yang DW, Xiao ZL, Wu DX, Cao Z. Crystal structure of methanol[4-bromo-N-(2-pyridylmethyl)salicylal-diminato-N,N',O]nickel(II) Perchlorate, [Ni(CH3OH)(C14H14BrN2O2)]ClO4. Z KRIST-NEW CRYST ST 2005. [DOI: 10.1524/ncrs.2005.220.14.663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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213
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Chaudhuri T, Cao Z, Zinn K. 568 Real time imaging of cancer therapeutic effects of a natural product turmeric in cell culture and animal models. EJC Suppl 2004. [DOI: 10.1016/s1359-6349(04)80576-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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214
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Cao Z, Kemp MD, Wang Y, Peng H, Martinez JL, Newkirk RF, Townsel JG. Cloning and identification of Rab cDNAs from Limulus polyphemus. Cell Mol Biol (Noisy-le-grand) 2004; 50:737-47. [PMID: 15641165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Small GTPases of the Rab family are essential for the control of membrane transport between intracellular compartments. Trafficking of the sodium-dependent facilitative insulin responsive glucose transporter (GLUT 4) has been shown to be associated with the intracellular redistribution of Rabs 4, 5 and 11 in adipose and muscle tissues. As a prelude to studies of the endosomal trafficking of the choline cotransporter (ChCoT), we describe herein our initial efforts to identify Rab proteins in Limulus polyphemus central nervous system (CNS) tissue. The studies were initiated after results from Microarray analysis of Limulus RNA hybridized to mouse gene chips suggested the presence of RNA transcripts for Rab 7 protein. Subsequently, more than 30 sequences for different Rab proteins were aligned and several consensus segments were selected for degenerate primer design to produce Rabs 2, 4, 7, 9 and 11. The expected PCR fragment sizes were obtained using RT-PCR and subcloned into pCR II TOPO vector and transferred into E. coli Top 10. The nucleotide sequences indicated that the recombinants encoded partial amino acid sequences for Rabs 1a, 1b, 1c, 2, 2a, 2b, 3a, 4, 5a, 7a, 7b, 11a, 11b, 14, 33b1 and 33b2. Northern blot analyses showed that the molecular sizes of Limulus Rabs 3a, 4, 7, 11a and 11b ranged from approximately 1.94.6 Kb. These Rab proteins, particularly Rabs 4, 7 and 11, will be studied further to determine their possible roles in the trafficking of the Limulus ChCoT
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Chaudhuri T, Cao Z, Simhadri P, Wu H, Stargel A, Zinn K. 446 Evaluation of a cancer-specific Ad vector (Ad5-Id-1-luc) in the detection and monitoring of breast cancer. EJC Suppl 2004. [DOI: 10.1016/s1359-6349(04)80454-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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216
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Yang L, Cao Z, Li F, Post DE, Van Meir EG, Zhong H, Wood WC. Tumor-specific gene expression using the survivin promoter is further increased by hypoxia. Gene Ther 2004; 11:1215-23. [PMID: 15141159 PMCID: PMC3163156 DOI: 10.1038/sj.gt.3302280] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Increasing evidence indicates that survivin, an inhibitor of apoptosis protein (IAP), is expressed in human cancer cells but is absent from most normal adult tissues. Here, we examined the feasibility of using a survivin promoter (Sur-P) to direct therapeutic expression of a proapoptotic gene specifically in human tumor cells. First, we demonstrated that this promoter was highly active in human tumor cells but not in normal cells. Second, we found that Sur-P activity was upregulated by hypoxia in tumor cells. Third, to further enhance this promoter's activity under hypoxia, we added a hypoxia-responsive element (HRE) from the vascular endothelial growth factor gene promoter in its 5' region, and showed that this combination resulted in a further increase in the level of gene expression in hypoxic tumor cells. Finally, we demonstrated that expression of an autocatalytic reverse caspase-3 gene by this promoter specifically induced apoptotic cell death in human tumor cells but not in normal cells. These findings support the use of promoters Sur-P or chimeric HRE-Sur-P for generating novel vectors for cancer gene therapy.
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Chaudhuri TR, Cao Z, Ponnazhagan S, Stargel A, Simhadri PL, Zhou T, Lobuglio AF, Buchsbaum DJ, Zinn KR. Detection of disseminated breast cancer growth and treatment response using non-invasive bioluminescence imaging. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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218
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Abbasi RU, Abu-Zayyad T, Amann JF, Archbold G, Bellido JA, Belov K, Belz JW, Bergman DR, Cao Z, Clay RW, Cooper MD, Dai H, Dawson BR, Everett AA, Fedorova YA, Girard JHV, Gray RC, Hanlon WF, Hoffman CM, Holzscheiter MH, Hüntemeyer P, Jones BF, Jui CCH, Kieda DB, Kim K, Kirn MA, Loh EC, Manago N, Marek LJ, Martens K, Martin G, Matthews JAJ, Matthews JN, Meyer JR, Moore SA, Morrison P, Moosman AN, Mumford JR, Munro MW, Painter CA, Perera L, Reil K, Riehle R, Roberts M, Sarracino JS, Sasaki M, Schnetzer SR, Shen P, Simpson KM, Sinnis G, Smith JD, Sokolsky P, Song C, Springer RW, Stokes BT, Taylor SF, Thomas SB, Thompson TN, Thomson GB, Tupa D, Westerhoff S, Wiencke LR, VanderVeen TD, Zech A, Zhang X. Measurement of the flux of ultrahigh energy cosmic rays from monocular observations by the High Resolution Fly's Eye experiment. PHYSICAL REVIEW LETTERS 2004; 92:151101. [PMID: 15169276 DOI: 10.1103/physrevlett.92.151101] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2002] [Revised: 05/28/2003] [Indexed: 05/24/2023]
Abstract
We have measured the cosmic ray spectrum above 10(17.2) eV using the two air-fluorescence detectors of the High Resolution Fly's Eye observatory operating in monocular mode. We describe the detector, phototube, and atmospheric calibrations, as well as the analysis techniques for the two detectors. We fit the spectrum to a model consisting of galactic and extragalactic sources.
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Cao Z, McAdory BS, Wang Y, Peng H, Martinez JL, Townsel JG. The chemorepellent semaphorin is expressed in the horseshoe crab, Limulus polyphemus. Cell Mol Biol (Noisy-le-grand) 2003; 49:1261-7. [PMID: 14983996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Semaphorins are a family of soluble and membrane-bound proteins that play a critical role in axonal guidance and other processes of neuronal development. Currently, more than twenty semaphorins have been identified, all of which share a conserved 500 amino acid domain near the amino terminus. Semaphorins are divided into eight classes according to species of origin and structural similarities. Classes 1 and 2 are found in invertebrates, classes 3 through 7 are present in vertebrates and viruses encode class V semaphorin. Microarray analysis of Limulus CNS RNA revealed the presence of a semaphorin-like gene in Limulus polyphemus. Based on these data, we aligned 31 different sequences and designed degenerate primers for the consensus domains (WTT/SFLKA) and (DPY/VCA/GW). RT-PCR products were generated using 6 forward primers and 4 reverse primers. The expected size PCR products (750 bp) was obtained and then ligated with pCR II TOPO vector and transferred into E. coli Top 10. Five partial semaphorin cDNAs were found in Limulus: semaphorins 1a, 1b, 2a, 2b and F (now known as 5) were partially cloned. Subsequent Northern blot analyses using these Limulus specific-probes revealed hybridization with total RNAs purified from six different tissues.
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Bonnet F, Cao Z, Cooper ME, Cox AJ, Kelly DJ, Gilbert RE. Tranilast attenuates vascular hypertrophy, matrix accumulation and growth factor overexpression in experimental diabetes. DIABETES & METABOLISM 2003; 29:386-92. [PMID: 14526266 DOI: 10.1016/s1262-3636(07)70049-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVES The growth factors transforming growth factor-B (TGF-B) and epidermal growth factor (EGF) have both been implicated in the hypertrophic structural changes in the vasculature that are characteristic features of both human and experimental diabetes. Recently, tranilast (N(3,4-dimethoxycinnamoyl)anthranilic acid), a drug used in the treatment of allergic and dermatological diseases, has also been reported to inhibit transforming growth factor-B (TGF-B)-mediated collagen formation. However, its effects on vascular hypertrophy in diabetes are unknown. The present study thus sought to determine the effects of tranilast on both TGF-B and EGF expression and mast cells in mediating the trophic vascular changes in experimental diabetes. METHODS Vessel morphology, growth factors and collagen gene expression and matrix deposition were examined in the mesenteric arteries of control rats treated with or without tranilast, and streptozotocin-induced diabetic Sprague-Dawley rats treated with or without tranilast (200 mg/kg/day) during a 3-week period. RESULTS Compared with control animals, diabetic rats had significantly increased vessel weight, wall: lumen ratio, ECM accumulation, gene expression of TGF-B1, EGF, and both alpha1 (I) and alpha1 (IV) collagen. Tranilast treatment did not influence plasma glucose or systemic blood pressure. However, tranilast significantly reduced mesenteric weight, wall: lumen ratio and matrix deposition and also attenuated the overexpression of TGF-B1, EGF, and both alpha1 (I) and alpha1 (IV) collagen mRNA in diabetic rats. CONCLUSION These findings indicate that tranilast ameliorates pathological vascular changes observed in experimental diabetes in association with reduced growth factor expression independent of blood glucose or systemic blood pressure.
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Qian D, Shi Z, Zhang S, Cao Z, Liu W, Li L, Xie Y, Cambournac I, Bonami JR. Extra small virus-like particles (XSV) and nodavirus associated with whitish muscle disease in the giant freshwater prawn, Macrobrachium rosenbergii. JOURNAL OF FISH DISEASES 2003; 26:521-527. [PMID: 14575370 DOI: 10.1046/j.1365-2761.2003.00486.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A disease of Macrobrachium rosenbergii, the giant freshwater prawn, farmed in China was recently recorded in Zhejiang, Jiangsu, Shanghai, Guangxi and Guangdong provinces. The clinical sign of the disease, which develops in post-larvae (PL), is a whitish appearance of the muscles, particularly noticeable in the abdomen. Mortalities may reach 100% in some hatcheries. Investigations by transmission electron microscopy after negative staining of diseased PL homogenates showed the presence of two types of viral particles: one, unenveloped, icosahedral in shape, 26-27 nm in diameter, the second, much smaller, about 14-16 nm in diameter, designated extra small virus particle (XSV). The large virus has a genome with two pieces of ssRNA (RNA-1 and RNA-2), of 3 and 1.2 kb, respectively. Hybridization tests confirmed that this large virus is closely related to M. rosenbergii nodavirus (MrNV) which was isolated from diseased prawns in a hatchery in the French West Indies. Its very small size and hypothesized biochemical and biological characteristics suggest XSV is a new type of crustacean virus. As XSV has always been found associated with the larger virus (nodavirus) and is located in muscle and connective cells of diseased animals, it could be an autonomous virus, a helper-type virus or a satellite-like virus.
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Davis BJ, Johnston CI, Burrell LM, Burns WC, Kubota E, Cao Z, Cooper ME, Allen TJ. Renoprotective effects of vasopeptidase inhibition in an experimental model of diabetic nephropathy. Diabetologia 2003; 46:961-71. [PMID: 12838387 DOI: 10.1007/s00125-003-1121-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2002] [Revised: 12/19/2002] [Indexed: 01/13/2023]
Abstract
AIMS Although ACE inhibitors slow progression of diabetic renal disease, the mortality and morbidity is still high. As other hormonal factors are involved, inhibition of vasopeptidases could further reduce progression. We studied dual inhibition of angiotensin converting enzyme and neutral endopeptidase in a model of progressive diabetic renal injury. The major endpoints were reductions in systemic blood pressure, albuminuria and renal structural injury. METHODS Diabetic spontaneously hypertensive rats were treated with the ACE inhibitor perindopril (mg.kg(-1).day(-1)) or the vasopeptidase inhibitor omapatrilat at doses of 10 (oma10) and 40 (oma40) mg.kg(-1).day(-1) for 32 weeks. In vivo ACE and NEP inhibition was quantitated by in vitro autoradiography. Renal structural injury was assessed by measurement of the glomerulosclerotic (GS) index and tubulointerstitial area (TI). The expression of transforming growth factor beta, beta-inducible gene-h3 and nephrin were also quantitated. RESULTS Despite a similar reduction in blood pressure by perindopril and oma10, greater attenuation of albuminuria was afforded by oma10, with a complete amelioration observed with oma40. Oma40 lead to a 33% reduction in renal NEP binding and this was associated with less albuminuria and prevention of GS, TI area and overexpression of TGFbeta and betaig-h3. Diabetes-associated reduction in nephrin expression was restored by both drugs. CONCLUSION/INTERPRETATION These findings suggest that other vasoactive mechanisms in addition to angiotensin II are important in the prevention of diabetic nephropathy, and that vasopeptidase inhibition might confer an advantage over blockade of the RAS alone in the treatment of diabetic renal disease.
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Cao Z, Carling PA. Mathematical modelling of alluvial rivers: reality and myth. Part 2: Special issues. ACTA ACUST UNITED AC 2002. [DOI: 10.1680/wame.2002.154.4.297] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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224
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Cao Z, Carling PA. Mathematical modelling of alluvial rivers: reality and myth. Part 1: General review. ACTA ACUST UNITED AC 2002. [DOI: 10.1680/wame.2002.154.3.207] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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225
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Ching LM, Cao Z, Kieda C, Zwain S, Jameson MB, Baguley BC. Induction of endothelial cell apoptosis by the antivascular agent 5,6-Dimethylxanthenone-4-acetic acid. Br J Cancer 2002; 86:1937-42. [PMID: 12085190 PMCID: PMC2375421 DOI: 10.1038/sj.bjc.6600368] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2001] [Revised: 04/11/2002] [Accepted: 04/16/2002] [Indexed: 11/24/2022] Open
Abstract
5,6-Dimethylxanthenone-4-acetic acid, synthesised in this laboratory, reduces tumour blood flow, both in mice and in patients on Phase I trial. We used TUNEL (TdT-mediated dUTP nick end labelling) assays to investigate whether apoptosis induction was involved in its antivascular effect. 5,6-Dimethylxanthenone-4-acetic acid induced dose-dependent apoptosis in vitro in HECPP murine endothelial cells in the absence of up-regulation of mRNA for tumour necrosis factor. Selective apoptosis of endothelial cells was detected in vivo in sections of Colon 38 tumours in mice within 30 min of administration of 5,6-Dimethylxanthenone-4-acetic acid (25 mg x kg(-1)). TUNEL staining intensified with time and after 3 h, necrosis of adjacent tumour tissue was observed. Apoptosis of central vessels in splenic white pulp was also detected in tumour-bearing mice but not in mice without tumours. Apoptosis was not observed in liver tissue. No apoptosis was observed with the inactive analogue 8-methylxanthenone-4-acetic acid. Positive TUNEL staining of tumour vascular endothelium was evident in one patient in a Phase I clinical trial, from a breast tumour biopsy taken 3 and 24 h after infusion of 5,6-Dimethylxanthenone-4-acetic acid (3.1 mg x m(-2)). Tumour necrosis and the production of tumour tumour necrosis factor were not observed. No apoptotic staining was seen in tumour biopsies taken from two other patients (doses of 3.7 and 4.9 mg x m(-2)). We conclude that 5,6-Dimethylxanthenone-4-acetic acid can induce vascular endothelial cell apoptosis in some murine and human tumours. The action is rapid and appears to be independent of tumour necrosis factor induction.
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