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Ma N, Liu WL, Le HD, Jiang XY, Liu W, Liu X, Deng CF, Zhang BK, Xiang DX. High-performance liquid chromatographic analysis of resveratrol analog 3,5,4'- trimethoxystilbene in rat plasma. ACTA ACUST UNITED AC 2008; 30:215-20. [DOI: 10.1358/mf.2008.30.3.1139052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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1202
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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 PMCID: PMC11131760 DOI: 10.1007/s00018-007-7448-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [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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1203
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Muniz AS, Nobre FF, Liu H, Lyons KE, Pahwa R, Liu W, Nadal J. Assessment of the effects of subthalamic stimulation in Parkinson disease patients by artificial neural network. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2008; 2008:4700-4703. [PMID: 19163765 DOI: 10.1109/iembs.2008.4650262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This study aims at applying an artificial neural network for the evaluation of the effects of deep brain stimulation (DBS) of the subthalamic nucleus (STN) on Parkinson disease (PD) patients with and without medication. A sample of 15 PD patients who have undergone STN DBS were evaluated under four test conditions: medication off and stimulation off (mof-sof), medication off and stimulation on (mof-son), medication on and stimulation off (mon-sof) and medication on and stimulation on (mon-son). A control group with 30 subjects was also evaluated. Principal component analysis (PCA) was applied on vertical ground reaction force (vGRF) and the first six principal component scores (PC score) were obtained in both groups. Those PCs scores were used as input in a probabilistic neural network (PNN). PNN presented satisfactory classification performance in the separation of controls and PD with 90.1% accuracy, 69.2% sensitivity and 100% specificity. The stimulation mof-son and mon-son conditions presented better results compared to mon-sof. In the mof-son condition, 41.7% were classified as normal, while further enhancement (63.3%) was given by the mon-son condition. These results indicated the potentiality of PNN to quantitatively evaluate treatment effects. Furthermore, STN DBS shows improvement on vGRF pattern in PD patients, most substantially when used with medication.
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Pang X, Chen Z, Gao X, Liu W, Slavin M, Yao W, Yu LL. Potential of a novel polysaccharide preparation (GLPP) from Anhui-grown Ganoderma lucidum in tumor treatment and immunostimulation. J Food Sci 2007; 72:S435-42. [PMID: 17995702 DOI: 10.1111/j.1750-3841.2007.00431.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Growing evidence indicates the potential of developing novel polysaccharide-based adjuvant for tumor therapy from edible mushrooms, including Ganoderma lucidum. In the present study, a novel polysaccharide preparation (GLPP) was isolated from the fruiting body of G. lucidum grown in Anhui, China, and characterized for its physicochemical properties. GLPP had an average molecular weight of 6600 and a specific optical rotation of +25.6 degrees , contained 10.6% protein, and had a molar ratio of 0.9:15:1 for mannose, glucose, and galactose, respectively. GLPP was also investigated and compared with PSP (polysaccharopeptide preparation), a commercial antitumor and immunostimulating agent, for its antitumor and immunostimulation capacity, and potential in reducing the toxic effects induced by cyclophosphamide (Cy) treatment and Cobalt-60 ((60)Co) radiation in mice. GLPP at levels of 100 and 300 mg/kg body weight (BW)/d significantly inhibited the growth of inoculated S(180), Heps, and EAC tumor cells in mice. GLPP at a dose of 300 mg/kg BW/d showed stronger growth inhibition against all 3 tested tumor cells than PSP at 1 g/kg BW/d. GLPP also dose-dependently increased phagocytic index, phagocytic coefficient, and 50% hemolysin value in the EAC tumor-bearing mice, indicating its potential immunostimulating property. In addition, GLPP at 300 mg/kg BW/d was comparable to PSP at 1000 mg/kg BW/d in preventing the decrease of thymus index, spleen index, white blood cells, and bone marrow karyote numbers induced by Cy treatment and (60)Co radiation. These data demonstrated the potential utilization of GLPP as an adjuvant to conventional treatments of cancers and its use for cancer prevention.
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1205
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Duggan D, Zheng SL, Knowlton M, Benitez D, Dimitrov L, Wiklund F, Robbins C, Isaacs SD, Cheng Y, Li G, Sun J, Chang BL, Marovich L, Wiley KE, Balter K, Stattin P, Adami HO, Gielzak M, Yan G, Sauvageot J, Liu W, Kim JW, Bleecker ER, Meyers DA, Trock BJ, Partin AW, Walsh PC, Isaacs WB, Gronberg H, Xu J, Carpten JD. Two Genome-wide Association Studies of Aggressive Prostate Cancer Implicate Putative Prostate Tumor Suppressor Gene DAB2IP. J Natl Cancer Inst 2007; 99:1836-44. [DOI: 10.1093/jnci/djm250] [Citation(s) in RCA: 217] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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1206
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Wittekindt C, Liu W, Guntinas-Lichius O. Zur Effektivität von Botulinum Toxin-A (BTX-A) in der Behandlung des neuropathischen Schmerzes nach Neck dissection. KLIN NEUROPHYSIOL 2007. [DOI: 10.1055/s-2007-1032239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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1207
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Liu W, Wu RD, Dong YL, Gao YM. Neuroepithelial stem cells differentiate into neuronal phenotypes and improve intestinal motility recovery after transplantation in the aganglionic colon of the rat. Neurogastroenterol Motil 2007; 19:1001-9. [PMID: 17973630 DOI: 10.1111/j.1365-2982.2007.00981.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The purpose of this study was to elucidate the possibility and the biological significance of intracolonic grafting of neuroepithelial stem cells (NESCs) as a therapeutic strategy for neuronal replacement in disorders of the enteric nervous system (ENS) such as aganglionosis. The enteric plexus of rat colon were eliminated by serosal application of the cationic surfactant benzalkonium chloride. NESCs were harvested from the neural tube of embryonic rat, labelled with bromodeoxyuridine (BrdU), and transplanted into the denervated colon. After 2, 4 and 8 weeks, grafted cells were visualized in colon sections by fluorescent double-staining for BrdU and neuronal, astrocytic, neurochemical or stem cell markers. Eight weeks post-transplantation, the intestinal motility was assessed by measuring the changes of intraluminal pressure responding to inflating stimulation and the responses to electrical field stimulation (EFS). Our results indicate that when transplanted into the denervated gut, NESCs survived and could differentiate into neurons and glial cells in vivo. Furthermore, inflation stimulated contraction and EFS-induced response were observed in NESCs grafted group compared with no reaction in denervated group. Therefore, NESCs can survive and function in the denervated rat colon in vivo, which indicates that NESCs provide a promising cellular replacement candidate for ENS.
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1208
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Liu Q, Dewi DA, Liu W, Bee MS, Schonbrunn A. Distinct phosphorylation sites in the SST2A somatostatin receptor control internalization, desensitization, and arrestin binding. Mol Pharmacol 2007; 73:292-304. [PMID: 17981995 DOI: 10.1124/mol.107.038570] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The somatostatin subtype 2A (sst2A) receptor, a member of the G protein-coupled receptor superfamily, mediates many of the neuroendocrine and neuromodulatory actions of somatostatin, and it represents the primary target for somatostatin analogs used in cancer therapy and tumor localization. Agonist stimulation leads to the rapid phosphorylation, endocytosis, and desensitization of the sst2A receptor; however, little is known about the role of phosphorylation in sst2A regulation. sst2A phosphorylation occurs on serine and threonine residues in the third intracellular loop and carboxyl terminus. Therefore, we generated mutant receptors in which serine (Ser-), threonine (Thr-), or both (Ser-/Thr-) residues in these regions were mutated to alanine. In contrast to the wild-type receptor, somatostatin treatment did not stimulate the phosphorylation of the Ser-/Thr- mutant, and it did not produce desensitization. Furthermore, internalization of the Ser-/Thr- mutant occurred 5 times more slowly than with the wild-type receptor. Mutating only the Ser residues did not inhibit either internalization or desensitization. In contrast, mutating only the Thr residues inhibited receptor endocytosis to the same extent as in the full mutant, but it did not affect receptor desensitization. In both the wild-type and Ser- receptors, agonist binding produced a stable arrestin-receptor complex that was maintained during receptor trafficking, whereas arrestin was not recruited to either the Thr- or the Ser-/Thr- receptors. These results demonstrate that agonist-stimulated receptor phosphorylation is necessary for both desensitization and rapid internalization of the sst2A receptor. However, sst2A receptor internalization and uncoupling can occur independently, involve different receptor phosphorylation sites, and exhibit different requirements for stable arrestin association.
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1209
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Hou QX, Liu W, Liu ZH, Bai LL. Characteristics of Wood Cellulose Fibers Treated with Periodate and Bisulfite. Ind Eng Chem Res 2007. [DOI: 10.1021/ie0704750] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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1210
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Huang F, Yang Q, Chen L, Tang S, Liu W, Yu X. Renal pathological change in patients with type 2 diabetes is not always diabetic nephropathy: a report of 52 cases. Clin Nephrol 2007; 67:293-7. [PMID: 17542338 DOI: 10.5414/cnp67293] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
AIMS The present study examined the relationship between clinical features and renal histological changes in the Type 2-diabetic patients and evaluated the usefulness of renal biopsy in the diagnosis of diabetic versus non-diabetic kidney disease. METHODS 52 patients with Type 2-diabetic mellitus were retrospectively analyzed for differential clinical, laboratory features and pathological characteristics including overt proteinuria (> 0.5 g/day), elevated serum creatinine and/or the development of hematuria. RESULTS Of 52 patients, 20 cases (38.5%) showed no detectable diabetic lesions and, thus, were diagnosed as non-diabetic renal disease (NDRD), while 32 patients (61.5%) exhibited diabetic nephropathy. Interestingly, while 29 patients showed diabetic nephropathy (DN) alone, NDRD was also found in 3 patients with DN. Clinically, 24 out of 52 patients (46.16%) had a diagnosis consistent with the pathological findings, while 10 (19.23%) were diagnosed incorrectly. Compared to NDRD patients, patients with DN had prolonged diabetic history with or without retinopathy, while 25% of patients with NDRD exhibited mesangial proliferative glomerulonephritis. CONCLUSIONS NDRD was a common feature in Type 2-diabetic patients with renal involvement. The absence of retinopathy and short periods of diabetic history may be useful indicators for diagnosis of NDRD clinically.
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Guthold M, Liu W, Sparks EA, Jawerth LM, Peng L, Falvo M, Superfine R, Hantgan RR, Lord ST. A comparison of the mechanical and structural properties of fibrin fibers with other protein fibers. Cell Biochem Biophys 2007; 49:165-81. [PMID: 17952642 DOI: 10.1007/s12013-007-9001-4] [Citation(s) in RCA: 145] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2007] [Accepted: 08/22/2007] [Indexed: 11/29/2022]
Abstract
In the past few years a great deal of progress has been made in studying the mechanical and structural properties of biological protein fibers. Here, we compare and review the stiffness (Young's modulus, E) and breaking strain (also called rupture strain or extensibility, epsilon(max)) of numerous biological protein fibers in light of the recently reported mechanical properties of fibrin fibers. Emphasis is also placed on the structural features and molecular mechanisms that endow biological protein fibers with their respective mechanical properties. Generally, stiff biological protein fibers have a Young's modulus on the order of a few Gigapascal and are not very extensible (epsilon(max) < 20%). They also display a very regular arrangement of their monomeric units. Soft biological protein fibers have a Young's modulus on the order of a few Megapascal and are very extensible (epsilon(max) > 100%). These soft, extensible fibers employ a variety of molecular mechanisms, such as extending amorphous regions or unfolding protein domains, to accommodate large strains. We conclude our review by proposing a novel model of how fibrin fibers might achieve their extremely large extensibility, despite the regular arrangement of the monomeric fibrin units within a fiber. We propose that fibrin fibers accommodate large strains by two major mechanisms: (1) an alpha-helix to beta-strand conversion of the coiled coils; (2) a partial unfolding of the globular C-terminal domain of the gamma-chain.
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1212
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Park Y, Albright K, Storkson J, Liu W, Pariza M. Conjugated Linoleic Acid (CLA) Prevents Body Fat Accumulation and Weight Gain in an Animal Model. J Food Sci 2007; 72:S612-7. [DOI: 10.1111/j.1750-3841.2007.00477.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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1213
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Jin S, Li M, Liu W, Zhou Y. Effect of including different levels of palm kernel
cake to dairy cow concentrate on milk production
and composition. JOURNAL OF ANIMAL AND FEED SCIENCES 2007. [DOI: 10.22358/jafs/74608/2007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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1214
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Liu W, Lu G, Li X, Yang J, Yang X. Comparing the efficacy of pretreatment with metformin and Diane-35 in polycystic ovary syndrome. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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1215
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Han R, Lai R, Ding Q, Wang Z, Luo X, Zhang Y, Cui G, He J, Liu W, Chen Y. Apolipoprotein A-I stimulates AMP-activated protein kinase and improves glucose metabolism. Diabetologia 2007; 50:1960-1968. [PMID: 17639303 DOI: 10.1007/s00125-007-0752-7] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2007] [Accepted: 05/31/2007] [Indexed: 01/05/2023]
Abstract
AIMS/HYPOTHESIS In humans, one of the hallmarks of type 2 diabetes is a reduced plasma concentration of HDL and its major protein component, apolipoprotein A-I (APOA-I). However, it is unknown whether APOA-I directly protects against diabetes. The aim of this study was to characterise the functional role of APOA-I in glucose homeostasis. METHODS The effects of APOA-I on phosphorylation of AMP-activated protein kinase (AMPK) and acetyl-coenzyme A carboxylase (ACC), glucose uptake and endocytosis were analysed in C2C12 myocytes. Glucose metabolism was investigated in Apoa-I knockout (Apoa-I (-/-)) mice. RESULTS APOA-I was able to stimulate the phosphorylation of AMPK and ACC, and elevated glucose uptake in C2C12 myocytes. APOA-I could be endocytosed into C2C12 myotubes through a clathrin-dependent endocytotic process. Inhibition of endocytosis abrogated APOA-I-stimulated AMPK phosphorylation. In Apoa-I (-/-) mice, AMPK phosphorylation was reduced in skeletal muscle and liver, and expression of gluconeogenic enzymes was increased in liver. In addition, the Apoa-I (-/-) mice had increased fat content and compromised glucose tolerance. CONCLUSIONS/INTERPRETATION Our data indicate that APOA-I has a protective effect against diabetes via activation of AMPK. ApoA-I deletion in the mouse led to increased fat mass and impaired glucose tolerance.
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1216
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Wang S, Chen SW, Liu W, Zhu HJ, Jiang H, Wang YB, Zhu XW, Cai SL. Laparoscopic excision of extraprostatic ejaculatory duct cyst. Andrologia 2007; 39:81-6. [PMID: 17683467 DOI: 10.1111/j.1439-0272.2007.00768.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Our experiences with laparoscopic excisions of symptomatic extraprostatic ejaculatory duct cysts (EDCs) are reported. Three laparoscopic excisions of extraprostatic EDCs performed by one urologist in 2003 and 2004 were retrospectively reviewed. Investigations included history, physical examination, image analysis, semen analysis, operation time, estimated blood loss, time of post-operative hospital stay, recovery time for regular activities, sexual function and complications. The laparoscopic excisions of EDCs were successful. The mean operation time was 105 min, and the mean estimated blood loss was 65 ml. The average post-operative hospital stay was 3.0 days. All patients exhibited normal erection and normal ejaculation. Improvement in semen quality was observed in two patients. All patients remained free of symptoms, and recurrence of EDCs was not detected on transrectal ultrasonography over a mean 32-month follow-up period. It is concluded that laparoscopic excision of an EDC is feasible and effective. Due to minimal invasiveness, short post-operative hospitalisation and rapid recovery, laparoscopic surgery is an attractive approach to managing symptomatic EDCs, especially for sizeable cysts or those including calculus.
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1217
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Jia LH, Liu ZL, Zhu L, Liu W, Yao KL. Magnetic studies of a syn-anti triatomic carboxylate-bridging chainlike copper(II) complex exhibiting ferromagnetic exchange. J Chem Phys 2007; 127:064702. [PMID: 17705616 DOI: 10.1063/1.2756827] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The magnetic properties of triatomic syn-anti carboxylate bridging copper(II) complex, {[Cu(2,2'-bipydine)(maleate)].2H2O}infinity (complex 1), were investigated experimentally and theoretically, suggesting weak ferromagnetic intrachain interaction. The magnetic data were analyzed and interpreted in terms of Heisenberg chain model corrected by a mean molecular field. Fitting parameters obtained for J, g, and zJ' are 3.14 cm(-1), 2.08, and -0.13, respectively. Density functional theory with generalized gradient approximation was applied to calculate the electronic structure and spin distribution of the present complex. The structural and electronic factors controlling the magnetic interactions were also determined. Ferromagnetic intrachain interactions through triatomic syn-anti carboxylate bridge result from nonplanarity of the bridging network, the exchange pathway involving both the sigma and pi orbitals of the carboxylate bridge and the spin delocalization of each magnetic orbital on the atoms of the carboxylate bridge from the copper(II) centers.
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Hartford C, Yang W, Cheng C, Fan Y, Liu W, Treviño L, Pounds S, Neale G, Raimondi SC, Bogni A, Dolan ME, Pui CH, Relling MV. Genome scan implicates adhesion biological pathways in secondary leukemia. Leukemia 2007; 21:2128-36. [PMID: 17673902 DOI: 10.1038/sj.leu.2404885] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The genetic risk factors for etoposide-induced leukemia with MLL translocations remain largely unknown. To identify genetic risk factors for and novel characteristics of secondary leukemia, we profiled 116,204 single nucleotide polymorphisms (SNPs) in germline and paired leukemic cell DNA from 13 secondary leukemia/myelodysplasia cases and germline DNA from 13 matched and 156 unmatched controls, all with acute lymphoblastic leukemia treated with etoposide. We analyzed global gene expression from a partially overlapping cohort. No single locus was altered in most cases. We discovered 81 regions of loss of heterozygosity (LOH) in leukemic blasts and 309 SNPs whose allele frequencies differed in cases vs controls. Candidate genes were prioritized on the basis of genes whose SNPs or expression differentiated cases from controls or showed LOH or copy number change in germline vs paired blast DNA from the 13 cases. Three biological pathways were altered: adhesion, Wnt signaling and regulation of actin. Validation experiments using a genome scan for etoposide-induced leukemogenic MLL chimeric fusions in 15 HapMap cell lines also implicated genes involved in adhesion, a process linked to de novo leukemogenesis. Independent clinical epidemiologic and in vitro genome-wide approaches converged to identify novel pathways that may contribute to therapy-induced leukemia.
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Liu W, Zhu J, Cao L, Rodgers GP. Expression of hGC-1 is correlated with differentiation of gastric carcinoma. Histopathology 2007; 51:157-65. [PMID: 17650212 DOI: 10.1111/j.1365-2559.2007.02763.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AIMS The human G-CSF-stimulated clone-1 (hGC-1) gene encodes a 510-amino acid olfactomedin-related glycoprotein whose exact in vivo localization and function still remain elusive. The aim of this study was to demonstrate hGC-1 protein localization in the normal human gastrointestinal tract and to explore further a potential relationship between hGC-1 expression and gastric carcinoma. METHODS AND RESULTS A specific hGC-1 polyclonal antibody raised against purified hGC-1 protein was developed and characterized. Using immunohistochemistry, it was demonstrated that hGC-1 is expressed in the oesophagus, stomach, small intestine and colon. The expression pattern of hGC-1 protein in 173 cases of gastric carcinoma was investigated and a striking correlation was demonstrated between hGC-1 expression and histological type and differentiation of gastric carcinoma. Enhanced hGC-1 expression was more frequently seen in intestinal-type adenocarcinoma, whereas loss of expression tended to occur in the diffuse type. hGC-1 was highly expressed in well or moderately differentiated cancers and was remarkably reduced or lost in poorly differentiated or undifferentiated tumours. CONCLUSIONS These investigations have defined for the first time the expression pattern of hGC-1 in the normal human gastrointestinal tract and provide a novel and sensitive marker for the differentiation of gastric carcinoma.
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Burghaus L, Liu W, Haupt WF. [Cerebrotendinous xanthomatosis]. Dtsch Med Wochenschr 2007; 132:1463-6. [PMID: 17583829 DOI: 10.1055/s-2007-982053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
HISTORY AND CLINICAL FINDINGS A 43-year-old woman had since childhood suffered from progressive dementia. Gait ataxia and mild polyneuropathy were noted in the neurological examination. She also had painful xanthomas of the achilles tendons. A bilateral cataract operation had been performed during adolescence. INVESTIGATIONS An elevated concentration of cholestanol and a normal cholesterol level were found in the blood samples. The cerebral computed tomography revealed slight cerebral atrophy, predominantly affecting the cerebellum. Neurophysiological tests detected a sensory polyneuropathy in the legs. In addition the electroencephalogram showed a generalized slowing of electrical activity. DIAGNOSIS, TREATMENT AND COURSE Clinical findings and laboratory values indicated the diagnosis of a cerebrotendinous xanthomatosis. After initiation of a drug therapy, based on a combination of an HMG-CoA-reductase inhibitor (simvastatin 20 mg/day) and a bile acid, chenodeoxycholic acid (15 mg/kg/day), further progression of the disease was prevented. CONCLUSION The diagnosis of cerebrotendinous xanthomatosis is easily made in patients presenting all clinical symptoms expected in the disease. However, up to 30% of the patients do not show severe xanthomas. Especially in early stages of the disease the diagnosis may be difficult. Treatment can be efficacious and should be started as early as possible to prevent irreversible damage, particularly in the nervous system.
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Yang J, Liu J, Zheng J, Du W, He Y, Liu W, Huang S. A reappraisal by quantitative flow cytometry analysis of PTEN expression in acute leukemia. Leukemia 2007; 21:2072-4. [PMID: 17611573 DOI: 10.1038/sj.leu.2404740] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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1222
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Guthold M, Liu W, Sparks E, Carlisle C, Hantgan R, Falvo M, Superfine R, Lord S. THE VISCOELASTIC PROPERTIES OF SINGLE, CROSSLINKED AND UNCROSSLINKED FIBRIN FIBERS. J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb03255.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Liu W, Jamshidian M, Zhang Y, Bretz F, Han XL. Pooling batches in drug stability study by using constant-width simultaneous confidence bands. Stat Med 2007; 26:2759-71. [PMID: 17133619 DOI: 10.1002/sim.2756] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
One important study objective in drug stability studies is to estimate the shelf-life of a drug. A key statistical problem involved in this is how to assess the practical equivalence of different batches of the same drug so that different batches can be subgrouped to produce a single shelf-life for the drug. In this paper constant-width simultaneous confidence bands are proposed to quantify the magnitude of difference between different batches, with a particular view to establish the practical equivalence of different batches. This approach is suitable for the situation that the intercepts and slopes of the regression lines for the batches cannot be assumed to be equal. It is shown how constant-width simultaneous confidence bands can be easily constructed for the multiple comparison of several general linear regression models. In particular, it is shown that constant-width simultaneous confidence bands have a better chance to establish the equivalence than, and so are preferable to, the hyperbola-shaped simultaneous confidence bands considered.
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Carey MS, Hennessy BT, Gonzalez-Angulo AM, Liu W, Coombes KR, Guan Y, Kuo W, Smith-McCune K, Almeida J, Mills GB. Novel functional proteomics approach to defining ovarian cancer molecular heterogeneity. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.5502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
5502 Background: A number of clinicopathologic risk factors are used for survival prediction and clinical decision-making in epithelial ovarian cancer (EOC). Information from novel technologies such as gene arrays has not had an impact on patient management. We studied EOC protein signaling profiles to determine if their addition to accepted clinicopathologic factors improves their accuracy in predicting individual patient outcomes. Methods: We applied a novel functional proteomics technology, reverse phase protein array (RPPA), to quantify expression and activation of 42 steroid and kinase signaling pathway proteins in 106 high-grade EOCs from patients with stages 1–4 tumors managed with surgery and platinum-based chemotherapy. Cox regression analysis and a novel committee modeling approach were used to study the impact of functional proteomics on patient outcomes. Results: In a Cox model using only clinical variables, stage and residual disease were significantly related to overall survival. By adding the proteins to the clinical Cox model, two proteins that were significantly associated with overall survival on univariate analysis (phosphorylated-MAPK (p-MAPK; log rank p = 0.0047) and progesterone receptor (PR; log rank p = 0.027)) remained significant at the alpha=0.10 level (z-test p-values 0.074 and 0.034, respectively, when treated as binary variables according to martingale residual plots); as a result, these two proteins added to the predictive accuracy of the clinical survival model. However, using the novel committee modeling approach in test and validation EOC sets, a closest neighbor metric was applied to successfully define distinct proteins groups, each composed of nine proteins, that are predictive of specific survival times in patients with EOC. This granular approach to modeling is particularly suited to defining the molecular heterogeneity of EOC. Conclusions: EOC is a complex process with significant individual variability. Using novel approaches to functional proteomic study and statistical modeling, our striking finding is that distinct combinations of steroid and kinase signaling proteins are predictive markers of specific survival times in EOC. No significant financial relationships to disclose.
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Wiese D, Saha S, Ghanem M, Yestrepsky B, Patel M, Bassily N, Ng P, Liu W, Quiachon E, Badin J. Ultrastaging of sentinel lymph nodes (SLNs) compared to non-SLNs in colorectal (CRca) cancer: Do we need both? J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.4055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
4055 Background: SLN mapping (M) accurately stages many solid tumors including CRca. SLNs are 3–5 times more likely to have metastases (mets) when ultrastaged by microsections and IHC as compared to non-SLNs examined by standard pathological methods. It is unknown whether ultrastaging of initially -ve non-SLNs would lead to higher incidence of +ve nodes. Hence, we retrospectively analyzed all initially -ve non-SLNs by microsections and IHC similar to SLNs in CRca patients (pts) undergoing SLNM to determine its impact on final nodal staging. Methods: All CRca pts underwent SLNM by circumferential subserosal injection of 1% lymphazurin. First 1–4 blue nodes were marked as SLNs and ultrastaged by 4 section with H&E and 1 with IHC. All non-SLNs were initially examined by single H& E section and initial staging was made as per AJCC criteria. We re-examined all initially -ve non-SLNs similar to the SLNs by a senior pathologist blinded to prior results. Results: There were 156 pts with Cca and 44 pts with Rca. SLNM was successful in 100% pts with 94% accuracy rate. A total of 2,755 nodes (13.78/pt) were identified, of which 494 were SLNs and 2,261 were non-SLNs. Nodal positivity was 46% and 16% for Cca and Rca pts respectively. Mets were detected in 20.9% of SLNs vs. 8.6% of non-SLNs (p< 0.0001). The exclusive site of nodal mets was detected in 6.5% of SLNs vs.0.8% of non-SLNs (p< 0.0001). Skip mets were found in 6% of pts. After ultrastaging all initially -ve non-SLNs (n=2,065), only 0.58% (12/2065) nonSLNs became +ve in 12 pts. Of these, 10 pts already had +ve SLNs, hence no change of staging occurred. Only 2/200 pts (1%) with initially -ve non-SLNs were found to have a cluster of tumor cells. Thus, ultrastaging of 2065 initially -ve non-SLNs in 200 pts changed the staging from II to III only in 1% of pts. Conclusions: SLNM is highly accurate in staging CRca. The chance of finding additional mets by ultrastaging of all non-SLNs is extremely low (< 1%), hence of little benefit. Therefore, ultrastaging restricted to SLNs alone will assure accurate staging of CRca. [Table: see text] No significant financial relationships to disclose.
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