26
|
Bening C, Weiler H, Vahl CF. Impact of diastolic dysfunction on global contractile capacity on the level of the myofilaments. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
27
|
Weiler H, Moeller O, Wohlhöfer M, Bening C, Vahl CF. Methylene blue and tolonium chloride impair cardiac performance in human atrial tissue. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
28
|
Abugameh A, Weiler H, Bening C, Vahl CF. Mid- and longterm results for patients undergoing MIDCAB-procedure for LAD-single-vessel-disease. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
29
|
Gallo S, Comeau K, Vanstone C, Sharma A, Agellon S, L'Abbé M, Khamessan A, Jones G, Weiler H, Rodd C. Redefining normal mineral and calcitropic hormone status in healthy infants. Clin Biochem 2012. [DOI: 10.1016/j.clinbiochem.2012.07.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
30
|
Gallo S, Comeau K, Vanstone C, Agellon S, Jones G, L’Abbé M, Khamessan A, Sharma A, Rodd C, Weiler H. Supplementation with Oral Vitamin D3 (400 Iu/Day) Supports Plasma Levels of 25-Hydroxyvitamin D of 50 NMOL/L But Higher Intakes are Required to Reach 75 NMOL/L in Breastfed Infants. Paediatr Child Health 2012. [DOI: 10.1093/pch/17.suppl_a.13ab] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
31
|
Weiler H. Multiple receptor-mediated functions of activated protein C. Hamostaseologie 2012; 31:185-95. [PMID: 21826371 DOI: 10.5482/ha-1166] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Accepted: 06/17/2011] [Indexed: 01/08/2023] Open
Abstract
The central effector protease of the protein C pathway, activated protein C (APC), interacts with the endothelial cell protein C receptor, with protease activated receptors (PAR), the apolipoprotein E2 receptor, and integrins to exert multiple effects on haemostasis and immune cell function. Such receptor interactions modify the activation of PC and determine the biological response to endogenous and therapeutically administered APC. This review summarizes the current knowledge about interactions of APC with cell surface-associated receptors, novel substrates such as histones and tissue factor pathway inhibitor, and their implications for the biologic function of APC in the control of coagulation and inflammation.
Collapse
|
32
|
Weiler H, Conzelmann LO, Mehlhorn U, Vahl CF. A hidden guide wire after coronary angiography- four years lost in the body. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
33
|
Abugameh A, Weiler H, Meinardus S, Conzelmann LO, Vahl CF. Comparision of flow analysis in T- Graft, Y- Graft and Omega-Graft for myocardrevascularization. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
34
|
Weiler H, Moeller O, Wohlhoefer M, Conzelmann LO, Albers J, Vahl CF. Methylene blue reduces myocardial contractility. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
35
|
Abugameh A, Weiler H, Post F, Vahl CF. Ascending aorta perforation following dislocation of percutaneous transcatheter aortic valve implantation (TAVI). Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
36
|
Weiler H, Moeller O, Jungbecker J, Albers J, Abugameh A, Vahl CF. The effect of the multi purpose drug tolonium chloride on myocardial contractility. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
37
|
Haché S, Takser L, LeBellego F, Weiler H, Leduc L, Forest JC, Giguère Y, Masse A, Barbeau B, Lafond J. Alteration of calcium homeostasis in primary preeclamptic syncytiotrophoblasts: effect on calcium exchange in placenta. J Cell Mol Med 2011; 15:654-67. [PMID: 20178461 PMCID: PMC3922387 DOI: 10.1111/j.1582-4934.2010.01039.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Preeclampsia (PE) is characterized by maternal hypertension, proteinuria, oedema and, in 30% of cases, by intrauterine growth retardation. Causes are still unknown; however, epidemiological and clinical studies have suggested alterations in maternal calcium metabolism. We suggested that in PE, calcium transport by the syncytiotrophoblast (ST) is disturbed. From total placental tissues, we studied the expression of: calcium channels (TRPV5, TRPV6 [transient receptor potential vanilloid]), calcium binding proteins (CaBP-9K, CaBP-28K), plasma membrane calcium ATPase (PMCA)1,2,3,4 pumps, ATP synthase, genes implicated in Ca2+ release [inositol-1,4,5-triphosphate receptor (IP3R)1,2,3; Ryanodine receptor (RyR)1,2,3] and replenishment (SERCA1,2,3 [sarcoendoplasmic reticulum Ca2+ ATPases]) from endoplasmic reticulum, channels implicated in mitochondrial Ca2+ accumulation (VDAC1,2,3 [voltage-dependent anion channels]) and a marker of oxidative stress (hOGG1 [Human 8-oxoguanine-DNA glycosylase 1]), as well as the influence of these variations on calcium transport in primary ST cultures. The mRNA and protein levels were thereby examined by real-time PCR and Western blot analysis, respectively, in two different groups of pregnant women with similar gestational age: a normal group (n= 16) and a PE group (n= 8), diagnosed by a clinician. Our study showed a significant decrease in calcium transport by the ST cultured from preeclamptic placentas. We found a significant (P < 0.05) decrease in mRNA levels of TRPV5, TRPV6, CaBP-9K, CaBP-28K, PMCA1, PMCA4, ATP synthase, IP3R1, IP3R2, RyR1, RyR2 and RyR3 in PE group compared to normal one. We also noted a significant decrease in protein levels of TRPV5, TRPV6, CaBP-9K, CaBP-28K and PMCA1/4 in PE group. In contrast, SERCA1, SERCA2, SERCA3, VDAC3 and hOGG1 mRNA expressions were significantly increased in PE placentas. Calcium homeostasis and transport through placenta is compromised in preeclamptic pregnancies and it appears to be affected by a lack of ATP and an excess of oxidative stress.
Collapse
|
38
|
Stolle K, Lietz M, Steffen Y, Weiler H, Möhring M, Berges A, Lebrun S. 335 THE APOE−/− MOUSE AS A CIGARETTE SMOKE-RESPONSIVE ATHEROSCLEROSIS MODEL SHOWING REVERSIBILITY UPON SMOKING CESSATION. ATHEROSCLEROSIS SUPP 2011. [DOI: 10.1016/s1567-5688(11)70336-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
39
|
Kruger M, Coetzee M, Haag M, Weiler H. Long-chain polyunsaturated fatty acids: Selected mechanisms of action on bone. Prog Lipid Res 2010; 49:438-49. [DOI: 10.1016/j.plipres.2010.06.002] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Indexed: 01/11/2023]
|
40
|
Rodd C, Jean-Philippe S, Vanstone C, Weiler H. Comparison of Parent-Perceived Acceptance of Two Vitamin D Supplementation Modalities in Newborn in fants. Paediatr Child Health 2010. [DOI: 10.1093/pch/15.suppl_a.68ab] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
41
|
Abstract
Activated protein C (aPC) is the key effector protease of the natural protein C anticoagulant pathway and exerts anticoagulant, as well as anti-inflammatory activity. This dual mode of action has been thought to underlie the therapeutic efficacy of recombinant aPC in the treatment of patients suffering from severe forms of sepsis. The development and characterization of recombinant variants of aPC with altered bioactivity profiles has generated an opportunity to test this concept by dissecting the roles of aPC's anticoagulant and cell-signaling functions in the treatment of sepsis. Animal studies suggest that aPC variants with near-normal signaling function, but with greatly diminished anticoagulant potential may exhibit a substantially improved risk-to-benefit ratio in sepsis therapy.
Collapse
|
42
|
Mosesson MW, Cooley BC, Hernandez I, Diorio JP, Weiler H. Thrombosis risk modification in transgenic mice containing the human fibrinogen thrombin-binding gamma' chain sequence. J Thromb Haemost 2009; 7:102-10. [PMID: 18983496 DOI: 10.1111/j.1538-7836.2008.03213.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND OBJECTIVES Thrombin binding activity in murine fibrin (Antithrombin I) is restricted to its E domains inasmuch as murine gamma' chains (mu-gamma') do not bind thrombin. This feature prompted us to produce a 'gain-of-function' transgenic mouse in which the wild-type (WT) C-terminal mu-gamma' chain fibrinogen sequence had been replaced with the C-terminal thrombin-binding human gamma' sequence. RESULTS This procedure resulted in a murine fibrinogen species containing chimeric hu-gamma' chains (hu-gamma' fibrinogen). As anticipated, thrombin bound to WT fibrin at a single class of sites, whereas thrombin binding to heterodimeric hu-gamma'-containing fibrin was increased, reflecting its content of hu-gamma' chains. In an electrolytically-induced femoral vein thrombosis injury model, we found no differences in the volume of thrombus generation between WT and heterozygous hu-gamma' mice. However, heterozygous factor (F) V Leiden (FVL(+/-)) mice developed greater thrombus volumes than did WT controls (P < 0.01). In doubly heterozygous FVL(+/-), hu-gamma' mice, thrombus formation was reduced to WT levels (P < 0.05). CONCLUSIONS Murine hu-gamma' fibrinogen down-regulates venous thrombosis in the presence of another known thrombosis risk factor, FV Leiden. This finding indicates that hu-gamma' chain-containing fibrinogen is a thrombosis risk modifier.
Collapse
|
43
|
Weiler H, Von Bülow V. Detection of different macrophage‐activating factor and interferon activities in supernatants of chicken lymphocyte cultures1. Avian Pathol 2008; 16:439-52. [DOI: 10.1080/03079458708436394] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
44
|
Maroney SA, Cooley BC, Sood R, Weiler H, Mast AE. Combined tissue factor pathway inhibitor and thrombomodulin deficiency produces an augmented hypercoagulable state with tissue-specific fibrin deposition. J Thromb Haemost 2008; 6:111-7. [PMID: 17973652 PMCID: PMC3646640 DOI: 10.1111/j.1538-7836.2007.02817.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVE Tissue factor pathway inhibitor (TFPI) and thrombomodulin (TM) are endothelial-associated anticoagulant proteins thought to control hemostasis in specific vascular beds. Here, we have examined the consequences of TFPI deficiency in the presence of a compounding procoagulant state caused by reduced TM function. METHODS AND RESULTS TFPI(+/-)/TM(pro/pro) mice are born at less than expected frequency in either TFPI(+/-)/TM(pro/+) or TM(pro/pro) mothers but are born at near the expected frequency in TM(pro/+) mothers. Adult TFPI(+/-)/TM(pro/pro) mice have elevated thrombin-antithrombin complex and increased thrombus volume in an electrical injury model of venous thrombosis. In striking contrast to mice with single deficiency of TFPI or TM, TFPI(+/-)/TM(pro/pro) mice exhibit augmented fibrin deposition not only in the liver, but also in the cerebral microvasculature. CONCLUSIONS TFPI(+/-)/TM(pro/pro) mice exhibit partial intrauterine lethality when carried by mothers with an underlying prothrombotic state, providing the first experimental evidence in an animal model that TFPI-dependent control of hemostasis in the vascular bed of the placenta fulfills a critical role for successful pregnancy outcome. In addition to the placenta, partial TFPI deficiency interacts with decreased TM function in an organ selective manner to produce fibrin deposition in other specific vascular beds, the liver and brain.
Collapse
|
45
|
Isermann B, Blautzik J, Vinnikov I, Herzog S, Weiler H, Bierhaus A, Nawroth P. THE THROMBOMODULIN PROTEIN C SYSTEM PROTECTS AGAINST DIABETIC NEUROPATHY VIA TWO INDEPENDENT MECHANISMS. J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb00998.x] [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]
|
46
|
Farmer C, Petit HV, Weiler H, Capuco AV. Effects of dietary supplementation with flax during prepuberty on fatty acid profile, mammogenesis, and bone resorption in gilts1,2. J Anim Sci 2007; 85:1675-86. [PMID: 17400971 DOI: 10.2527/jas.2007-0022] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The possible role of dietary flax on pre-pubertal development of mammary glands and bone resorption was investigated in gilts. Fifty-seven gilts were fed 1 of 4 diets from 88 d of age until slaughter (d 212 +/- 1). Diets were control without flax (n = 14); 10% flaxseed supplementation (n = 13); 6.5% flaxseed meal supplementation (n = 15); and 3.5% flaxseed oil supplementation (n = 15). All diets were isonitrogenous and isocaloric. Jugular blood samples were obtained on d 78 and 210 to establish the fatty acid profile and to determine the concentrations of prolactin, estradiol, and cross-linked N-telopeptides of type I collagen. At slaughter, the mammary glands were excised, parenchymal and extraparenchymal tissues were dissected, and the composition of the parenchymal tissue (protein, fat, DM, and DNA) was determined. Histochemical analyses of the mammary parenchyma were performed, and fatty acid profiles in the extraparenchymal tissue were evaluated. Dietary flax increased (P < or = 0.001) the concentrations of PUFA and decreased those of SFA (P < 0.01) and MUFA (P < or = 0.001) in plasma and extraparenchymal tissues, which was largely due to the inclusion of 10% flaxseed or 3.5% flaxseed oil (P < or = 0.01) but not 6.5% flaxseed meal. Circulating concentrations of prolactin and estradiol were unaltered by treatments (P > 0.1), but concentrations of cross-linked N-telopeptides of type I collagen tended to be greater (P < 0.1) in flax-supplemented gilts. The DM content of parenchymal tissue was the only mammary compositional value affected, showing an increase with flax addition (P < 0.05). No change (P > or = 0.1) in the bromodeoxyuridine labeling index or estrogen receptor localization was observed with treatments. Dietary supplementation with flax as seed, meal, or oil, therefore, brought about the expected changes in the fatty acid profile but had no beneficial effects on mammary development or bone resorption.
Collapse
|
47
|
Weiler H. Endothelial protein C receptor: location...with a pool! J Thromb Haemost 2007; 5:1391-3. [PMID: 17456191 DOI: 10.1111/j.1538-7836.2007.02599.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
48
|
Isermann B, Blautzik J, Vinnikov I, Herzog S, Weiler H, Linn T, Bierhaus A, Nawroth PP. Das endotheliale Thrombomodulin Protein C System schützt vor der diabetischen Neuropathie durch zwei unabhängige Mechanismen. DIABETOL STOFFWECHS 2007. [DOI: 10.1055/s-2007-982115] [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]
|
49
|
Sood R, Weiler H. 1A.1 Animal model of fetal loss in factor V Leiden carriers: pathogenic mechanism and therapeutic targets. Thromb Res 2007. [DOI: 10.1016/s0049-3848(07)70002-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
50
|
Opapeju FO, Nyachoti CM, House JD, Weiler H, Sapirstein HD. Growth performance and carcass characteristics of pigs fed short-season corn hybrids1. J Anim Sci 2006; 84:2779-86. [PMID: 16971579 DOI: 10.2527/jas.2005-353] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
An experiment was conducted to determine growth performance, carcass characteristics, and fat quality of growing-finishing pigs fed diets based on short-season corn hybrids. Twenty-four individually housed, Cotswold, growing pigs with an initial BW of 41.4 (SD = 1.4) kg were blocked by BW and sex and randomly allotted from within block to 1 of 3 diets to give 8 replicate pigs per diet. Experimental diets consisted of a control based on barley and 2 diets based on corn as the main energy sources. A 3-phase feeding program for 20 to 50 kg (phase I), 50 to 80 kg (phase II), and 80 to 110 kg (phase III) of BW was used. Diets for each phase contained approximately 3.5 Mcal/kg of DE, with total lysine of 0.95, 0.75, and 0.64% in phase I, II, and III diets, respectively. Average daily gain, ADFI, and G:F were monitored weekly during each phase. Pigs were slaughtered after reaching a minimum BW of 100 kg to determine carcass characteristics. There were no effects of diet on ADG, ADFI, and G:F (0.45 +/- 0.02, 0.34 +/- 0.02, and 0.31 +/- 0.02 for phase I, II, and III, respectively). Carcass length, dressing percent, LM area, loin depth, backfat thickness, belly firmness, and L*, b*, and a* fat color were not different across dietary treatments. Pigs fed one corn variety had no differences in fatty acid profile with barley-fed pigs, whereas those fed the other variety of corn had a greater (P < 0.05) concentration of PUFA in their backfat. The results indicate that growth performance, carcass characteristics, and fat quality of pigs fed diets based on short-season corn hybrids and those fed the barley-based diet were not different.
Collapse
|