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Berenguer J, Zamora FX, Aldámiz-Echevarría T, Von Wichmann MA, Crespo M, López-Aldeguer J, Carrero A, Montes M, Quereda C, Téllez MJ, Galindo MJ, Sanz J, Santos I, Guardiola JM, Barros C, Ortega E, Pulido F, Rubio R, Mallolas J, Tural C, Jusdado JJ, Pérez G, Díez C, Álvarez-Pellicer J, Esteban H, Bellón JM, González-García J, Miralles P, Cosín J, López J, Padilla B, Parras F, Carrero A, Aldamiz-Echevarría T, Tejerina F, Gutiérrez I, Ramírez M, Carretero S, Bellón J, Berenguer J, Alvarez-Pellicer J, Rodríguez E, Arribas J, Montes M, Bernardino I, Pascual J, Zamora F, Peña J, Arnalich F, Díaz M, González-García J, Bustinduy M, Iribarren J, Rodríguez-Arrondo F, Von-Wichmann M, Blanes M, Cuellar S, Lacruz J, Montero M, Salavert M, López-Aldeguer J, Callau P, Miró J, Gatell J, Mallolas J, Ferrer A, Galindo M, Van den Eynde E, Pérez M, Ribera E, Crespo M, Vergas J, Téllez M, Casado J, Dronda F, Moreno A, Pérez-Elías M, Sanfrutos M, Moreno S, Quereda C, Jou A, Tural C, Arranz A, Casas E, de Miguel J, Schroeder S, Sanz J, Condés E, Barros C, Sanz J, Santos I, Hernando A, Rodríguez V, Rubio R, Pulido F, Domingo P, Guardiola J, Ortiz L, Ortega E, Torres R, Cervero M, Jusdado J, Rodríguez-Zapata M, Pérez G, Gaspar G, Barquilla E, Ramírez M, Moyano B, Aznar E, Esteban H. Comparison of the Prognostic Value of Liver Biopsy and FIB-4 Index in Patients Coinfected With HIV and Hepatitis C Virus. Clin Infect Dis 2014; 60:950-8. [DOI: 10.1093/cid/ciu939] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Kasimanickam R, Asay M, Schroeder S, Kasimanickam V, Gay JM, Kastelic JP, Hall JB, Whittier WD. Calm temperament improves reproductive performance of beef cows. Reprod Domest Anim 2014; 49:1063-7. [PMID: 25293406 DOI: 10.1111/rda.12436] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 09/07/2014] [Indexed: 11/29/2022]
Abstract
Profitability of a beef operation is determined by the proportion of cows attaining pregnancy early in the breeding season and those that are pregnant at the end of breeding season. Many factors, including temperament, contribute to those reproductive parameters. The objective of this study was to evaluate effects of temperament on reproductive performance of beef cows. In Experiment 1, Angus and Angus-cross beef cows (n = 1546) from eight locations were assigned a body condition score (BCS; 1 = emaciated; 9 = obese) and chute exit and gait score (1 = slow exit, walk; calm temperament; 2 = jump, trot or run; excitable temperament). Cows were grouped with bulls (1 : 25 to 1 : 30; with satisfactory breeding potential and free of venereal disease) for an 85-day breeding season. Pregnancy status and stage of gestation were determined (transrectal palpation) 35 days after the end of the breeding season. Controlling for BCS (p < 0.01) and handling facility (p < 0.0001) and handling facility by temperament score interaction (p < 0.001), breeding season pregnancy rate was lower in excited versus calm cows [88.6% (798/901) vs 94.1% (607/645); p < 0.001]. Cows with an excitable temperament took 24 more days to become pregnant compared to calm cows (median days to pregnancy, 35 vs 59 days; p < 0.0001). In Experiment 2, Angus and Angus-cross beef cows (n = 1407) from 8 locations were assigned scores for body condition and chute exit and gait (as described in Experiment 1) and assigned to bulls (breeding sound and free of venereal disease; 1 : 25 to 1 : 30) for 85 days. Pregnancy status was determined by transrectal palpation at 2 and 6 months after the onset of the breeding season. Controlling for BCS (p < 0.05), pregnancy loss was higher in excited versus calm cows [5.5% (36/651) vs 3.2% (20/623), p < 0.0001]. In conclusion, beef cows with an excitable temperament had significantly lower reproductive performance than calmer cows. The modified two-point chute exit-gait scoring method was repeatable and identified cattle with an excitable temperament.
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Kasimanickam R, Schroeder S, Assay M, Kasimanickam V, Moore DA, Gay JM, Whittier WD. Influence of temperament score and handling facility on stress, reproductive hormone concentrations, and fixed time AI pregnancy rates in beef heifers. Reprod Domest Anim 2014; 49:775-82. [PMID: 25130754 DOI: 10.1111/rda.12368] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 06/03/2014] [Indexed: 11/28/2022]
Abstract
The objectives were (i) to evaluate the effect of temperament, determined by modified 2-point chute exit and gait score, on artificial insemination (AI) pregnancy rates in beef heifers following fixed time AI and (ii) to determine the effect of temperament on cortisol, substance-P, prolactin and progesterone at initiation of synchronization and at the time of AI. Angus beef heifers (n = 967) at eight locations were included in this study. At the initiation of synchronization (Day 0 = initiation of synchronization), all heifers received a body condition score (BCS), and temperament score (0 = calm; slow exit and walk or 1 = excitable; fast exit or jump or trot or run). Blood samples were collected from a sub-population of heifers (n = 86) at both synchronization initiation and the time of AI to determine the differences in serum progesterone, cortisol, prolactin and substance-P concentrations between temperament groups. Heifers were synchronized with 5-day CO-Synch+ controlled internal drug release (CIDR) protocol and were inseminated at 56 h after CIDR removal. Heifers were examined for pregnancy by ultrasound 70 days after AI to determine AI pregnancy. Controlling for synchronization treatment (p = 0.03), facility design (p = 0.05), and cattle handling facility design by temperament score interaction (p = 0.02), the AI pregnancy differed between heifers with excitable and calm temperament (51.9% vs 60.3%; p = 0.01). The alley-way with acute bends and turns, and long straight alley-way had lower AI pregnancy rate than did the semicircular alley-way (53.5%, 56.3% and 67.0% respectively; p = 0.05). The serum hormone concentrations differed significantly between different types of cattle handling facility (p < 0.05). The cattle handling facility design by temperament group interactions significantly influenced progesterone (p = 0.01), cortisol (p = 0.01), prolactin (p = 0.02) and substance-P (p = 0.04) both at the initiation of synchronization and at the time of AI. Inter- and intra-rater agreement for temperament scoring were moderate and good (Kappa = 0.596 ± 0.07 and 0.797 ± 0.11) respectively. The predictive value for calm and pregnant to AI was 0.87, and excited and non-pregnant to AI was 0.76. In conclusion, the modified 2-point temperament scoring method can be used to identify heifers with excitable temperament. Heifers with excitable temperament had lower AI pregnancy. Further, cattle handling facility design influenced the temperament and AI pregnancy.
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Bali S, Palmer DJ, Schroeder S, Ferguson SJ, Warren MJ. Recent advances in the biosynthesis of modified tetrapyrroles: the discovery of an alternative pathway for the formation of heme and heme d 1. Cell Mol Life Sci 2014; 71:2837-63. [PMID: 24515122 PMCID: PMC11113276 DOI: 10.1007/s00018-014-1563-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 12/19/2013] [Accepted: 01/10/2014] [Indexed: 02/05/2023]
Abstract
Hemes (a, b, c, and o) and heme d 1 belong to the group of modified tetrapyrroles, which also includes chlorophylls, cobalamins, coenzyme F430, and siroheme. These compounds are found throughout all domains of life and are involved in a variety of essential biological processes ranging from photosynthesis to methanogenesis. The biosynthesis of heme b has been well studied in many organisms, but in sulfate-reducing bacteria and archaea, the pathway has remained a mystery, as many of the enzymes involved in these characterized steps are absent. The heme pathway in most organisms proceeds from the cyclic precursor of all modified tetrapyrroles uroporphyrinogen III, to coproporphyrinogen III, which is followed by oxidation of the ring and finally iron insertion. Sulfate-reducing bacteria and some archaea lack the genetic information necessary to convert uroporphyrinogen III to heme along the "classical" route and instead use an "alternative" pathway. Biosynthesis of the isobacteriochlorin heme d 1, a cofactor of the dissimilatory nitrite reductase cytochrome cd 1, has also been a subject of much research, although the biosynthetic pathway and its intermediates have evaded discovery for quite some time. This review focuses on the recent advances in the understanding of these two pathways and their surprisingly close relationship via the unlikely intermediate siroheme, which is also a cofactor of sulfite and nitrite reductases in many organisms. The evolutionary questions raised by this discovery will also be discussed along with the potential regulation required by organisms with overlapping tetrapyrrole biosynthesis pathways.
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Palmer DJ, Schroeder S, Lawrence AD, Deery E, Lobo SA, Saraiva LM, McLean KJ, Munro AW, Ferguson SJ, Pickersgill RW, Brown DG, Warren MJ. The structure, function and properties of sirohaem decarboxylase--an enzyme with structural homology to a transcription factor family that is part of the alternative haem biosynthesis pathway. Mol Microbiol 2014; 93:247-61. [PMID: 24865947 PMCID: PMC4145669 DOI: 10.1111/mmi.12656] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2014] [Indexed: 11/28/2022]
Abstract
Some bacteria and archaea synthesize haem by an alternative pathway, which involves the sequestration of sirohaem as a metabolic intermediate rather than as a prosthetic group. Along this pathway the two acetic acid side-chains attached to C12 and C18 are decarboxylated by sirohaem decarboxylase, a heterodimeric enzyme composed of AhbA and AhbB, to give didecarboxysirohaem. Further modifications catalysed by two related radical SAM enzymes, AhbC and AhbD, transform didecarboxysirohaem into Fe-coproporphyrin III and haem respectively. The characterization of sirohaem decarboxylase is reported in molecular detail. Recombinant versions of Desulfovibrio desulfuricans, Desulfovibrio vulgaris and Methanosarcina barkeri AhbA/B have been produced and their physical properties compared. The D. vulgaris and M. barkeri enzyme complexes both copurify with haem, whose redox state influences the activity of the latter. The kinetic parameters of the D. desulfuricans enzyme have been determined, the enzyme crystallized and its structure has been elucidated. The topology of the enzyme reveals that it shares a structural similarity to the AsnC/Lrp family of transcription factors. The active site is formed in the cavity between the two subunits and a AhbA/B-product complex with didecarboxysirohaem has been obtained. A mechanism for the decarboxylation of the kinetically stable carboxyl groups is proposed.
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Aeschlimann FA, Hofer KD, Cannizzaro E, Schroeder S, Lauener R, Saurenmann RK. SAT0461 Infliximab Treatment in Children: Frequency of Infusion Reactions and Role of Desensitization. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Schroeder S, Cannizzaro E, Kellenberger CJ, Saurenmann RK. A 12-year-old girl with absent radial pulse: arterial thoracic outlet syndrome with subclavian artery aneurysm and thrombosis of the brachial artery. Eur J Pediatr 2012; 171:1707-9. [PMID: 22543529 DOI: 10.1007/s00431-012-1748-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Accepted: 04/12/2012] [Indexed: 11/30/2022]
Abstract
Brachial arterial occlusion is rare in children and adolescents. Once a traumatic cause is excluded, the differential diagnosis consists of a variety of rare conditions. We report the case of a 12-year-old girl whose presenting symptoms--an absent radial pulse and Raynaud's phenomenon of the right hand--could be easily mistaken for a vasculitis. She was found to have arterial thoracic outlet syndrome with right subclavian artery compression and aneurysm formation caused by an anomalous first rib and consecutive thromboembolic occlusion of the brachial artery. The diagnosis and differential diagnosis of this condition are reviewed.
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Deery E, Schroeder S, Lawrence AD, Taylor SL, Seyedarabi A, Waterman J, Wilson KS, Brown D, Geeves MA, Howard MJ, Pickersgill RW, Warren MJ. An enzyme-trap approach allows isolation of intermediates in cobalamin biosynthesis. Nat Chem Biol 2012; 8:933-40. [PMID: 23042036 PMCID: PMC3480714 DOI: 10.1038/nchembio.1086] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Accepted: 09/05/2012] [Indexed: 11/16/2022]
Abstract
The biosynthesis of many vitamins and coenzymes has often proved difficult to elucidate due to a combination of low abundance and kinetic lability of the pathway intermediates. Through a serial reconstruction of the cobalamin (vitamin B12) pathway in E. coli, and by His-tagging the terminal enzyme in the reaction sequence, we have observed that many unstable intermediates can be isolated as tightly-bound enzyme-product complexes. Together, these approaches have been used to extract intermediates between precorrin-4 and hydrogenobyrinic acid in their free acid form and permitted the delineation of the overall reaction catalysed by CobL, including the formal elucidation of precorrin-7 as a metabolite. Furthermore, a substrate-carrier protein, CobE, has been identified, which can also be used to stabilize some of the transient metabolic intermediates and enhance their onward transformation. The tight association of pathway intermediates with enzymes provides evidence for a form of metabolite channeling.
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Saenger S, Holtmann B, Nilges MR, Schroeder S, Hoeflich A, Kletzl H, Spooren W, Ostrowitzki S, Hanania T, Sendtner M, Metzger F. Functional improvement in mouse models of familial amyotrophic lateral sclerosis by PEGylated insulin-like growth factor I treatment depends on disease severity. ACTA ACUST UNITED AC 2012; 13:418-29. [PMID: 22871074 DOI: 10.3109/17482968.2012.679944] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Insulin-like growth factor I (IGF-I) has been successfully tested in the SOD1-G93A mouse model of familial amyotrophic lateral sclerosis (ALS) and proposed for clinical treatment. However, beneficial effects required gene therapy or intrathecal application. Circumventing the dosing issues we recently found that polyethylene glycol (PEG) modified IGF-I (PEG-IGF-I) modulated neuromuscular function after systemic application, and protected against disease progression in a motor neuron disease model. Here we investigated its effects in two SOD1-G93A mouse lines, the G1L with a milder and the G1H with a more severe phenotype. Results showed that in G1L mice, PEG-IGF-I treatment significantly improved muscle force, motor coordination and animal survival. In contrast, treatment of G1H mice with PEG-IGF-I or IGF-I even at high doses did not beneficially affect survival or functional outcomes despite increased signalling in brain and spinal cord by both agents. In conclusion, the data point towards further investigation of the therapeutic potential of PEG-IGF-I in ALS patients with less severe clinical phenotypes.
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Courtemanche A, Schroeder S, Sheldon J, Sherman J, Fowler A. Observing signs of pain in relation to self-injurious behaviour among individuals with intellectual and developmental disabilities. JOURNAL OF INTELLECTUAL DISABILITY RESEARCH : JIDR 2012; 56:501-515. [PMID: 21954901 DOI: 10.1111/j.1365-2788.2011.01492.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Self-injurious behaviour is a chronic condition among people with intellectual and developmental disabilities for which there is no known cure. The pain hypothesis suggests that individuals who engage in self-injury have altered or diminished pain perception. The purpose of the present study was to assess how frequently individuals diagnosed with an intellectual and developmental disability who engage in chronic self-injury displayed non-verbal signs of pain in relation to their self-injury. METHODS We videotaped four participants (aged 28-50 years) in their homes during times when they were likely to engage in self-injury. Using continuous recording measures, we coded videotapes for the frequency and duration of self-injury and expressions of non-verbal pain-related behaviours. Sequential analyses were conducted to identify temporal relations between pain-related behaviours and self-injury. RESULTS Our data suggest that the existing measures of pain may be systematically related to instances of self-injury. The relationships, however, appear to vary depending on the person who engages in self-injury, the environmental contexts in which the self-injury occurs, and perhaps, the type of self-injury in which the person engages. CONCLUSIONS These results support some of the findings of Symons et al. and they raise questions about the blunted nociception hypothesis of self-injury.
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Carmona-Gutierrez D, Ruckenstuhl C, Bauer MA, Netzberger C, Eisenberg T, Braun RJ, Rockenfeller P, Khoury CM, Moitzi B, Sommer C, Ring J, Schroeder S, Habernig L, Mazzoni C, Winderickx J, Gourlay CW, Madeo F. A new Canterbury tale: the eighth International Meeting on Yeast Apoptosis in Canterbury, UK, 2-6 May 2011. Cell Death Differ 2011; 18:1948-9. [PMID: 21886177 PMCID: PMC3214903 DOI: 10.1038/cdd.2011.115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Berenguer J, von Wichmann MA, Quereda C, Miralles P, Mallolas J, Lopez-Aldeguer J, Alvarez-Pellicer J, De Miguel J, Crespo M, Guardiola JM, Tellez MJ, Galindo MJ, Arponen S, Barquilla E, Bellon JM, Gonzalez-Garcia J, Miralles P, Cosin J, Lopez JC, Padilla B, Sanchez Conde M, Bellon JM, Gutierrez I, Ramirez M, Carretero S, Aldamiz-Echevarria T, Tejerina F, Berenguer J, Alvarez-Pellicer J, Rodriguez E, Arribas JR, Montes ML, Bernardino I, Pascual JF, Zamora F, Pena JM, Arnalich F, Gonzalez-Garcia J, Bustinduy MJ, Iribarren JA, Rodriguez-Arrondo F, Von-Wichmann MA, Blanes M, Cuellar S, Lacruz J, Montero M, Salavert M, Lopez-Aldeguer J, Callau P, Miro JM, Gatell JM, Mallolas J, Ferrer A, Galindo MJ, Van den Eynde E, Perez M, Ribera E, Crespo M, Vergas J, Tellez MJ, Casado JL, Dronda F, Moreno A, Perez-Elias MJ, Sanfrutos MA, Moreno S, Quereda C, Jou A, Tural C, Arranz A, Casas E, de Miguel J, Schroeder S, Sanz J, Condes E, Barros C, Sanz J, Santos I, Hernando A, Rodriguez V, Rubio R, Pulido F, Domingo P, Guardiola JM, Ortiz L, Ortega E, Torres L:R, Cervero M, Jusdado JJ, Montes ML, Perez G, Gaspar G, Barquilla E, Mahillo B, Moyano B, Cotarelo M, Aznar E, Esteban H. Effect of accompanying antiretroviral drugs on virological response to pegylated interferon and ribavirin in patients co-infected with HIV and hepatitis C virus. J Antimicrob Chemother 2011; 66:2843-9. [DOI: 10.1093/jac/dkr362] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Schroeder S, Heuser A, Tellmann A, Goebel KJ, Woehrmann T. Local tolerance of intraarticular administration of lornoxicam into the rabbit knee joint. Rheumatol Int 2011; 32:2661-7. [DOI: 10.1007/s00296-011-2012-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Accepted: 07/10/2011] [Indexed: 10/18/2022]
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Suter L, Schroeder S, Meyer K, Gautier JC, Amberg A, Wendt M, Gmuender H, Mally A, Boitier E, Ellinger-Ziegelbauer H, Matheis K, Pfannkuch F. EU Framework 6 Project: Predictive Toxicology (PredTox)—overview and outcome. Toxicol Appl Pharmacol 2011; 252:73-84. [DOI: 10.1016/j.taap.2010.10.008] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Revised: 10/06/2010] [Accepted: 10/09/2010] [Indexed: 11/16/2022]
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Liang J, Lee PS, Gollhardt N, Schroeder S, Morris W. Creep Study for Fatigue Life Assessment of Two Lead-Free High Temperature Solder Alloys. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-445-307] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractCreep of two lead-free high temperature solder alloys, 95Sn-5Ag and 99Sn-1.0Cu was studied in this investigation. Room and high temperature creep tests were performed to examine deformation mechanisms and to establish mathematical models of creep deformation for the alloys. A state variable creep model was introduced to model both primary and secondary creep deformation of these two alloys which show a very significant primary creep. Fatigue life models of the alloys were established based on an energy-based failure criteria, which was deduced from variable strain amplitude tests at a constant strain rate of 0.003/sec, and from variable strain rates tests with two constant strain amplitudes of 0.005 and 0.01. Applications of the creep model includes determination of peak loads and hysteresis strain energy density in strain-controlled fatigue tests. It is demonstrated that the creep model can be very helpful to establish fatigue failure criteria and to assess fatigue lives of these two alloys.
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Wager J, Tietze AL, Denecke H, Schroeder S, Vocks S, Kosfelder J, Zernikow B, Hechler T. [Pain perception of adolescents with chronic functional pain : adaptation and psychometric validation of the Pain Perception Scale (SES) by Geissner]. Schmerz 2010; 24:236-50. [PMID: 20461415 DOI: 10.1007/s00482-010-0920-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Pain perception is a central aspect of the multidimensional model of chronic pain. Up to now, validated measurement tools are lacking in the German language for measuring pain perception in adolescents. The aim of this study was to examine and adapt the well-established Pain Perception Scale for Adults by Geissner (SES) for use in adolescents with chronic pain to provide a measure for clinical diagnosis and evaluation of treatment effects. MATERIAL AND METHODS Principal component, reliability and item analyses were conducted on a sample with 139 adolescents. To test validity, age and sex effects, correlations with pain-related constructs, differences between treatment groups (inpatients vs outpatients) and concordance between adolescents and their parents were analysed. RESULTS Findings support a two-factor solution with one affective and one sensory factor; three additional sensory items were included in the final version. The scales show good internal consistency. Consistent with hypotheses, we found significant correlations with pain characteristics, emotional and cognitive variables as well as pain-related disability. Inpatients and outpatients show a significant difference in affective pain perception. Concordance between parents and adolescents was high. CONCLUSION With this questionnaire there is now a validated German assessment tool to measure pain perception in adolescents with chronic pain (Pain Perception Scale for Adolescents, SES-J). Due to its practicability it is suitable for clinical application.
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Becalski A, Stadler R, Hayward S, Kotello S, Krakalovich T, Lau BPY, Roscoe V, Schroeder S, Trelka R. Antioxidant capacity of potato chips and snapshot trends in acrylamide content in potato chips and cereals on the Canadian market. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2010; 27:1193-8. [PMID: 20582779 DOI: 10.1080/19440049.2010.483692] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The concentration of acrylamide was measured in selected varieties of five brands of potato chips and breakfast cereals over a 5-year period. Most of the products were purchased in one locality in Canada. Samples were analysed by an isotope dilution ((13)C(3)) acrylamide method. They were extracted with water, partitioned with dichloromethane, filtered through a 5 kDa centrifuge filter, cleaned-up on HLB Oasis polymeric and Accucat mixed mode anion and cation exchange SPE columns, and analysed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). The acrylamide concentration in potato chips varied from 106 to 4630 ng g(-1), while values in cereals varied from 50 to 347 ng g(-1). Wide variations were observed between brands, within brands over time, and between lots of the same brand. A subset of potato chip samples was analysed for in vitro antioxidant activity. No relationship was found between antioxidative capacity of potato chips and their acrylamide content.
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Locher HH, Ritz D, Pfaff P, Gaertner M, Knezevic A, Sabato D, Schroeder S, Barbaras D, Gademann K. Dimers of Nostocarboline with Potent Antibacterial Activity. Chemotherapy 2010; 56:318-24. [DOI: 10.1159/000320033] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2009] [Accepted: 03/29/2010] [Indexed: 11/19/2022]
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Ku G, Yuan J, Schroeder S, Page D, Panageas K, Carvajal R, Chapman P, Schwartz G, Allison J, Wolchok J. PP60 Correlation of absolute lymphocyte count with clinical benefit and overall survival: results of compassionate-use trial of ipilimumab in advanced melanoma at Memorial Sloan-Kettering Cancer Center. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)72180-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Burgstahler C, Brodoefel H, Schroeder S. Cardiac CT in 2009. Minerva Cardioangiol 2009; 57:495-509. [PMID: 19763071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Multislice computed tomography is an emerging diagnostic modality in cardiology practice. Within the last decade a rapid technical evolution from 4-slice scanners to 64-slice and meanwhile 320-slice scanners which faster gantry rotation time has taken place. These advances as well as improved post-processing tools account for a stabilization of image quality and allow assessing cardiac structures with high spatial and temporal resolution. Moreover, dedicated acquisition techniques have been employed to reduce radiation exposure to a minimum. Today cardiac computed tomography is not only able to depict the coronary arteries, but to get reliable information about cardiac function and cardiac structure. This review focuses on present clinical indications and future application of multi-slice computed tomography in clinical cardiology.
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Schuijf JD, Beck T, Burgstahler C, Jukema JW, Dirksen MS, de Roos A, van der Wall EE, Schroeder S, Wijns W, Bax JJ. Differences in plaque composition and distribution in stable coronary artery disease versus acute coronary syndromes; non‐invasive evaluation with multi‐slice computed tomography. ACTA ACUST UNITED AC 2009; 9:48-53. [PMID: 17453539 DOI: 10.1080/17482940601052648] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Plaque composition rather than degree of luminal narrowing may be predictive of acute coronary syndromes (ACS). The purpose of the study was to compare plaque composition and distribution with multi-slice computed tomography (MSCT) between patients presenting with either stable coronary artery disease (CAD) or ACS. METHODS MSCT was performed in 22 and 24 patients presenting with ACS or stable CAD, respectively. Coronary lesions were classified as calcified, non-calcified or mixed while signal intensity (SI) was measured. RESULTS In patients with stable CAD, the majority of lesions were calcified (89%). In patients with ACS, less calcifications were observed with a greater proportion of non-calcified (18%) or mixed (36%) lesions (P<0.001). Accordingly, mean SI of plaques was significantly less in ACS (320+/-201 HU versus 620+/-256 HU in stable CAD, P<0.001). Dividing lesions in the ACS group according to culprit versus non-culprit vessel location resulted in no significant difference in average SI between these two groups while still lower as compared to stable CAD (P<0.001). CONCLUSIONS In patients with ACS, significantly less calcifications were present as compared to stable CAD. Moreover, even in non-culprit vessels, multiple non-calcified plaques were detected, indicating diffuse rather than focal atherosclerosis in ACS.
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Bakkaloglu SA, Keefer MS, Schroeder S, Stanley P, Harrell DS, Reiff A. Experience with multiple stent implantations in primary antiphospholipid syndrome in childhood: a case report. Clin Exp Rheumatol 2009; 27:664-667. [PMID: 19772804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The antiphospholipid syndrome (APS) is an autoimmune condition characterized by the persisting presence of antiphospholipid antibodies in association with thrombosis and/or pregnancy morbidity. Primary APS is quite rare in childhood and exact prevalence is not known. However, substantial proportion of thrombotic events in children is being attributed to APS. We herein present a 9-year-old boy presented with impending pericardial tamponade and large pleural effusions likely secondary to transudation of fluid from his gradually developed collateral circulation which was resulted from almost completely occluded vena caval system due to primary APS. He was treated with multiple angioplasty-stenting which offered symptomatic relief and better quality of life. To our knowledge, this is the first reported paediatric case of primary APS presented with extensive occlusive lesions in both caval systems and treated with repeated endovascular stent placements.
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Brodoefel H, Burgstahler C, Heuschmid M, Reimann A, Khosa F, Kopp A, Schroeder S, Claussen CD, Clouse ME. Accuracy of dual-source CT in the characterisation of non-calcified plaque: use of a colour-coded analysis compared with virtual histology intravascular ultrasound. Br J Radiol 2009; 82:805-12. [PMID: 19332517 DOI: 10.1259/bjr/35768497] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Non-invasive assessment of plaque volume and composition is important for risk stratification and long-term studies of plaque stabilisation. Our aim was to evaluate dual-source computed tomography (DSCT) and colour-coded analysis in the quantification and classification of coronary atheroma. DSCT and virtual histology intravascular ultrasound (IVUS-VH) were prospectively performed in 14 patients. 22 lesions were compared in terms of plaque volume, maximal per cent vessel stenosis and percentages of fatty, fibrous or calcified components. Plaque characterisation was performed with software that automatically segments luminal or outer vessel boundaries and uses CT attenuation for a colour-coded plaque analysis. Good correlation was found for per cent vessel stenosis in DSCT (53+/-13%) and IVUS (51+/-14%; r(2) = 0.70). Mean volumes for entire plaque and non-calcified atheroma were 68.5+/-33 mm(3) and 56.7+/-30 mm(3), respectively, in DSCT and 60.8+/-29 mm(3) and 55.8+/-26 mm(3), respectively, in IVUS. Mean percentages of fatty, fibrous or calcified components were 28.2+/-6%, 53.2+/-9% and 18.7+/-13%, respectively, in DSCT and 29.9+/-5%, 55.3+/-12% and 14.4+/-9%, respectively, in IVUS-VH. Significant overestimation was present for the entire plaque and the volume of calcified plaque (p = 0.03; p = 0.0004). Although good correlation with IVUS was obtained for the entire plaque (r(2) = 0.76) and non-calcified plaque volume (r(2) = 0.84), correlation proved very poor and insignificant for percentage plaque composition. Interclass correlation coefficients for non-calcified plaque volume and percentages of fatty, fibrous or calcified components were 0.99, 0.99, 0.95 and 0.98, respectively, and intraclass coefficients were 0.98, 0.93, 0.98 and 0.99, respectively. We found that using Hounsfield unit-based analysis, DSCT allows for accurate quantification of non-calcified plaque. Although percentage plaque composition proves highly reproducible, it is not correlated with IVUS-VH.
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Fiore AM, Dentener FJ, Wild O, Cuvelier C, Schultz MG, Hess P, Textor C, Schulz M, Doherty RM, Horowitz LW, MacKenzie IA, Sanderson MG, Shindell DT, Stevenson DS, Szopa S, Van Dingenen R, Zeng G, Atherton C, Bergmann D, Bey I, Carmichael G, Collins WJ, Duncan BN, Faluvegi G, Folberth G, Gauss M, Gong S, Hauglustaine D, Holloway T, Isaksen ISA, Jacob DJ, Jonson JE, Kaminski JW, Keating TJ, Lupu A, Marmer E, Montanaro V, Park RJ, Pitari G, Pringle KJ, Pyle JA, Schroeder S, Vivanco MG, Wind P, Wojcik G, Wu S, Zuber A. Multimodel estimates of intercontinental source-receptor relationships for ozone pollution. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008jd010816] [Citation(s) in RCA: 390] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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50
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Weber S, Baessler B, Schroeder S. Lymphocyte Apoptosis in Sepsis and Potential Anti-apoptotic Strategies. Intensive Care Med 2009. [DOI: 10.1007/978-0-387-92278-2_14] [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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