Journal of negative results in biomedicine最新文献

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Comparative measurement of CNP and NT-proCNP in human blood samples: a methodological evaluation. 人类血液样本中CNP和NT-proCNP的比较测量:方法学评价。
Journal of negative results in biomedicine Pub Date : 2013-04-01 DOI: 10.1186/1477-5751-12-7
Andreas Kuehnl, Jaroslav Pelisek, Martin Bruckmeier, Wajima Safi, Hans-Henning Eckstein
{"title":"Comparative measurement of CNP and NT-proCNP in human blood samples: a methodological evaluation.","authors":"Andreas Kuehnl,&nbsp;Jaroslav Pelisek,&nbsp;Martin Bruckmeier,&nbsp;Wajima Safi,&nbsp;Hans-Henning Eckstein","doi":"10.1186/1477-5751-12-7","DOIUrl":"https://doi.org/10.1186/1477-5751-12-7","url":null,"abstract":"<p><strong>Background: </strong>C-type natriuretic peptide (CNP) has anti-inflammatory, anti-proliferative, and anti-migratory properties. During the past years, CNP has attained an increasing interest by many research groups, especially in the cardiovascular field. Nevertheless, still no reliable data exist on the difference of CNP concentration between serum and plasma samples. Also, the influence of delayed blood sample proceeding is unknown. The aim of this study was to investigate the difference of CNP and NT-proCNP concentrations between serum and plasma samples. In order to identify potential methodological bias, this study should also validate the stability of CNP and NT-proCNP in full blood samples stored at room temperature.</p><p><strong>Findings: </strong>Triplets (serum, plasma, full blood) of fasting blood samples from 12 healthy male individuals were collected. Analysis of CNP and NT-proCNP concentration was performed immediately following sampling, and after 30 minutes or 2 hours of storage at room temperature. Mean serum concentrations at baseline were 0.997 ± 0.379 ng/ml for CNP and 58.5 ± 28.3 pg/ml for NT-proCNP. Furthermore, NT-proCNP concentration did not change significantly during the allotted time and did not differ between serum, plasma, and full blood samples. At baseline, concentrations of CNP were significantly different between samples containing either sodium-citrate or EDTA as a clotting inhibitor (1.933 ± 0.699 ng/ml vs. 0.991 ± 0.489 ng/ml, p = 0.001).</p><p><strong>Conclusions: </strong>CNP and NT-proCNP are stable for at least two hours, even when sample processing is delayed or blood probes are stored at room temperature. NT-proCNP assay demonstrated more consistent and reliable data and should therefore be preferred for usage in clinical applications. Nevertheless, as recommended for ANP and BNP, immunoassays for CNP should also be standardized or harmonized in the future.</p>","PeriodicalId":73849,"journal":{"name":"Journal of negative results in biomedicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/1477-5751-12-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40243338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Exclusion of eleven candidate genes for ocular melanosis in Cairn terriers. 排除凯恩犬眼部黑色素病的11个候选基因。
Journal of negative results in biomedicine Pub Date : 2013-03-01 DOI: 10.1186/1477-5751-12-6
Paige A Winkler, Joshua T Bartoe, Celeste R Quinones, Patrick J Venta, Simon M Petersen-Jones
{"title":"Exclusion of eleven candidate genes for ocular melanosis in Cairn terriers.","authors":"Paige A Winkler,&nbsp;Joshua T Bartoe,&nbsp;Celeste R Quinones,&nbsp;Patrick J Venta,&nbsp;Simon M Petersen-Jones","doi":"10.1186/1477-5751-12-6","DOIUrl":"https://doi.org/10.1186/1477-5751-12-6","url":null,"abstract":"<p><strong>Background: </strong>Ocular melanosis of Cairn terrier dogs is an inherited defect characterized by progressive pigmentation of both eyes which can result in glaucoma and blindness. Pedigree analysis suggests the trait has an autosomal dominant mode of inheritance. We selected 11 potential candidate genes and used an exclusion analysis approach to investigate the likelihood that one of the candidate gene loci contained the Cairn terrier-ocular melanosis locus.</p><p><strong>Results: </strong>Two polymorphic loci were identified within or close to each candidate gene. Genotyping of at least 10 ocular melanosis Cairn terriers for each marker showed that there was no single shared allele for either of the two polymorphic markers identified in ASIP, COMT, GPNMB, GSK3B, LYST, MC1R, MITF, SILV, TYR, TYRP1,and TYRP2. This is strong evidence to exclude each locus as the site of the ocular melanosis mutation (probability of a false exclusion calculated for each gene ranged from 1.59 × 10-4 to 1 × 10-9).</p><p><strong>Conclusions: </strong>None of the 11 potential candidate genes selected are likely to be the gene locus for ocular melanosis in Cairn terriers.</p>","PeriodicalId":73849,"journal":{"name":"Journal of negative results in biomedicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/1477-5751-12-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31362723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Circulating rotaviral RNA in children with rotavirus antigenemia. 轮状病毒抗原血症患儿循环轮状病毒RNA
Journal of negative results in biomedicine Pub Date : 2013-02-01 DOI: 10.1186/1477-5751-12-5
Kamruddin Ahmed, Gulendam Bozdayi, Marcelo T Mitui, Selim Ahmed, Luthful Kabir, Dalgic Buket, Ilknur Bostanci, Akira Nishizono
{"title":"Circulating rotaviral RNA in children with rotavirus antigenemia.","authors":"Kamruddin Ahmed,&nbsp;Gulendam Bozdayi,&nbsp;Marcelo T Mitui,&nbsp;Selim Ahmed,&nbsp;Luthful Kabir,&nbsp;Dalgic Buket,&nbsp;Ilknur Bostanci,&nbsp;Akira Nishizono","doi":"10.1186/1477-5751-12-5","DOIUrl":"https://doi.org/10.1186/1477-5751-12-5","url":null,"abstract":"<p><strong>Background: </strong>Rotavirus antigenemia is a common phenomenon in children with rotavirus diarrhea, but information is scarce on aspects of this phenomenon, such as genotype specificity, presence of intact viruses and correlation between genomic RNA and antigen concentration. Such information may help in understanding rotavirus pathogenesis and eventually be useful for diagnosis, treatment and prevention.</p><p><strong>Methods and findings: </strong>Serum samples were collected from children who presented at hospitals with diarrhea. Antigenemia was present in 162/250 (64.8%) samples from children with rotavirus diarrhea. No specific rotavirus genotype was found to be associated with antigenemia. Rotavirus particles could not be found by electron microscopy in concentrated serum from children with high levels of antigenemia. In passaged rotavirus suspension a significant correlation (r=0.9559; P=0.0029) was found between antigen level and viral copy number, but no significant correlation (r=0.001480; P=0.9919) was found between antigenemia level and viral copy number in serum. When intact rotavirus was treated with benzonase endonuclease, genomic double-stranded (ds) RNA was not degraded, but when sera of patients with antigenemia were treated with benzonase endonuclease, genomic dsRNA was degraded, indicating genomic dsRNA was free in sera and not inside virus capsid protein.</p><p><strong>Conclusions: </strong>Antigenemia is present in a significant number of patients with rotavirus diarrhea. Rotavirus viremia was absent in the children with rotavirus diarrhea who participated in our study, and was not indicated by the presence of antigenemia. The significance of circulating rotavirus antigen and genomic dsRNA in serum of patients with diarrhea deserves further study.</p>","PeriodicalId":73849,"journal":{"name":"Journal of negative results in biomedicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/1477-5751-12-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31294728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Prolactin gene expression in primary central nervous system tumors. 泌乳素基因在原发性中枢神经系统肿瘤中的表达。
Journal of negative results in biomedicine Pub Date : 2013-01-14 DOI: 10.1186/1477-5751-12-4
Graziella Alebrant Mendes, Júlia Fernanda Semmelmann Pereira-Lima, Maria Beatriz Kohek, Geraldine Trott, Marlise Di Domenico, Nelson Pires Ferreira, Miriam da Costa Oliveira
{"title":"Prolactin gene expression in primary central nervous system tumors.","authors":"Graziella Alebrant Mendes,&nbsp;Júlia Fernanda Semmelmann Pereira-Lima,&nbsp;Maria Beatriz Kohek,&nbsp;Geraldine Trott,&nbsp;Marlise Di Domenico,&nbsp;Nelson Pires Ferreira,&nbsp;Miriam da Costa Oliveira","doi":"10.1186/1477-5751-12-4","DOIUrl":"https://doi.org/10.1186/1477-5751-12-4","url":null,"abstract":"<p><strong>Background: </strong>Prolactin (PRL) is a hormone synthesized in both the pituitary gland and extrapituitary sites. It has been associated with the occurrence of neoplasms and, more recently, with central nervous system (CNS) neoplasms. The aim of this study was to evaluate prolactin expression in primary central nervous system tumors through quantitative real-time PCR and immunohistochemistry (IH).</p><p><strong>Results: </strong>Patient mean age was 49.1 years (SD 15.43), and females accounted for 70% of the sample. The most frequent subtype of histological tumor was meningioma (61.5%), followed by glioblastoma (22.9%). Twenty cases (28.6%) showed prolactin expression by immunohistochemistry, most of them females (18 cases, 90%). Quantitative real-time PCR did not show any prolactin expression.</p><p><strong>Conclusions: </strong>Despite the presence of prolactin expression by IH, the lack of its expression by quantitative real-time PCR indicates that its presence in primary tumors in CNS is not a reflex of local production.</p>","PeriodicalId":73849,"journal":{"name":"Journal of negative results in biomedicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/1477-5751-12-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31160205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Human endogenous retrovirus K(HML-2) Gag and Env specific T-cell responses are not detected in HTLV-I-infected subjects using standard peptide screening methods. 人内源性逆转录病毒K(HML-2) Gag和Env特异性t细胞反应在htlv -i感染的受试者中使用标准肽筛选方法未检测到。
Journal of negative results in biomedicine Pub Date : 2013-01-10 DOI: 10.1186/1477-5751-12-3
R Brad Jones, Fabio E Leal, Aaron M Hasenkrug, Aluisio C Segurado, Douglas F Nixon, Mario A Ostrowski, Esper G Kallas
{"title":"Human endogenous retrovirus K(HML-2) Gag and Env specific T-cell responses are not detected in HTLV-I-infected subjects using standard peptide screening methods.","authors":"R Brad Jones,&nbsp;Fabio E Leal,&nbsp;Aaron M Hasenkrug,&nbsp;Aluisio C Segurado,&nbsp;Douglas F Nixon,&nbsp;Mario A Ostrowski,&nbsp;Esper G Kallas","doi":"10.1186/1477-5751-12-3","DOIUrl":"https://doi.org/10.1186/1477-5751-12-3","url":null,"abstract":"<p><strong>Background: </strong>An estimated 10-20 million individuals are infected with the retrovirus human T-cell leukemia virus type 1 (HTLV-1). While the majority of these individuals remain asymptomatic, 0.3-4% develop a neurodegenerative inflammatory disease, termed HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). HAM/TSP results in the progressive demyelination of the central nervous system and is a differential diagnosis of multiple sclerosis (MS). The etiology of HAM/TSP is unclear, but evidence points to a role for CNS-inflitrating T-cells in pathogenesis. Recently, the HTLV-1-Tax protein has been shown to induce transcription of the human endogenous retrovirus (HERV) families W, H and K. Intriguingly, numerous studies have implicated these same HERV families in MS, though this association remains controversial.</p><p><strong>Results: </strong>Here, we explore the hypothesis that HTLV-1-infection results in the induction of HERV antigen expression and the elicitation of HERV-specific T-cells responses which, in turn, may be reactive against neurons and other tissues. PBMC from 15 HTLV-1-infected subjects, 5 of whom presented with HAM/TSP, were comprehensively screened for T-cell responses to overlapping peptides spanning HERV-K(HML-2) Gag and Env. In addition, we screened for responses to peptides derived from diverse HERV families, selected based on predicted binding to predicted optimal epitopes. We observed a lack of responses to each of these peptide sets.</p><p><strong>Conclusions: </strong>Thus, although the limited scope of our screening prevents us from conclusively disproving our hypothesis, the current study does not provide data supporting a role for HERV-specific T-cell responses in HTLV-1 associated immunopathology.</p>","PeriodicalId":73849,"journal":{"name":"Journal of negative results in biomedicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/1477-5751-12-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31152338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Maternal undernutrition does not alter Sertoli cell numbers or the expression of key developmental markers in the mid-gestation ovine fetal testis. 母体营养不良不会改变妊娠中期羊胎儿睾丸中支持细胞数量或关键发育标志物的表达。
Journal of negative results in biomedicine Pub Date : 2013-01-08 DOI: 10.1186/1477-5751-12-2
Luis P Andrade, Stewart M Rhind, Michael T Rae, Carol E Kyle, Jamie Jowett, Richard G Lea
{"title":"Maternal undernutrition does not alter Sertoli cell numbers or the expression of key developmental markers in the mid-gestation ovine fetal testis.","authors":"Luis P Andrade,&nbsp;Stewart M Rhind,&nbsp;Michael T Rae,&nbsp;Carol E Kyle,&nbsp;Jamie Jowett,&nbsp;Richard G Lea","doi":"10.1186/1477-5751-12-2","DOIUrl":"https://doi.org/10.1186/1477-5751-12-2","url":null,"abstract":"<p><strong>Background: </strong>The aim of this study was to determine the effects of maternal undernutrition on ovine fetal testis morphology and expression of relevant histological indicators. Maternal undernutrition, in sheep, has been reported, previously, to alter fetal ovary development, as indicated by delayed folliculogenesis and the altered expression of ovarian apoptosis-regulating gene products, at day 110 of gestation. It is not known whether or not maternal undernutrition alters the same gene products in the day 110 fetal testis.</p><p><strong>Design and methods: </strong>Mature Scottish Blackface ewes were fed either 100% (Control; C) or 50% (low; L) of estimated metabolisable energy requirements of a pregnant ewe, from mating to day 110 of gestation. All pregnant ewes were euthanized at day 110 and a sub-set of male fetuses was randomly selected (6 C and 9 L) for histology studies designed to address the effect of nutritional state on several indices of testis development. Sertoli cell numbers were measured using a stereological method and Ki67 (cell proliferation index), Bax (pro-apoptosis), Mcl-1 (anti-apoptosis), SCF and c-kit ligand (development and apoptosis) gene expression was measured in Bouins-fixed fetal testis using immunohistochemistry.</p><p><strong>Results: </strong>No significant differences were observed in numbers of Sertoli cells or testicular Ki67 positive cells. The latter were localised to the testicular cords and interstitium. Bax and Mcl-1 were localised specifically to the germ cells whereas c-kit was localised to both the cords and interstitium. SCF staining was very sparse. No treatment effects were observed for any of the markers examined.</p><p><strong>Conclusions: </strong>These data suggest that, unlike in the fetal ovary, maternal undernutrition for the first 110 days of gestation affects neither the morphology of the fetal testis nor the expression of gene products which regulate apoptosis. It is postulated that the effects of fetal undernutrition on testis function may be expressed through hypothalamic-pituitary changes.</p>","PeriodicalId":73849,"journal":{"name":"Journal of negative results in biomedicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/1477-5751-12-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40215151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
A polymorphism associated with increased levels of YKL-40 and the risk of early onset of lone atrial fibrillation. 与YKL-40水平升高和早发性房颤风险相关的多态性
Journal of negative results in biomedicine Pub Date : 2013-01-02 DOI: 10.1186/1477-5751-12-1
Kristoffer M A Henningsen, Morten S Olesen, Golnaz Sajadieh, Stig Haunsoe, Jesper H Svendsen
{"title":"A polymorphism associated with increased levels of YKL-40 and the risk of early onset of lone atrial fibrillation.","authors":"Kristoffer M A Henningsen,&nbsp;Morten S Olesen,&nbsp;Golnaz Sajadieh,&nbsp;Stig Haunsoe,&nbsp;Jesper H Svendsen","doi":"10.1186/1477-5751-12-1","DOIUrl":"https://doi.org/10.1186/1477-5751-12-1","url":null,"abstract":"<p><strong>Background: </strong>Plasma levels of YKL-40 are elevated in patients with atrial fibrillation (AF). We hypothesized that a single nucleotide polymorphism (SNP) that affects YKL-40 plasma levels is associated to the risk of lone AF.</p><p><strong>Findings: </strong>We included 178 young patients with lone AF and the first episode before the age of 40 years, and a control group of 875 healthy individuals. We analyzed a promoter SNP (-131CG) (rs4950928) in the Chitinase 3-like 1 (CHI3L1) gene encoding YKL-40, which had previously been associated with elevated levels of YKL-40.</p><p><strong>Conclusions: </strong>The (-131CG) genotype was not associated with increased risk of AF. Genetically increased YKL-40 levels were not associated to AF.</p>","PeriodicalId":73849,"journal":{"name":"Journal of negative results in biomedicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/1477-5751-12-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40201845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Absence of subtelomeric rearrangements in selected patients with mental retardation as assessed by multiprobe T FISH. 通过多探针T - FISH评估选定的智力迟钝患者的亚端粒重排缺失。
Journal of negative results in biomedicine Pub Date : 2012-12-21 DOI: 10.1186/1477-5751-11-16
Suely Rodrigues dos Santos, Dértia Villalba Freire-Maia
{"title":"Absence of subtelomeric rearrangements in selected patients with mental retardation as assessed by multiprobe T FISH.","authors":"Suely Rodrigues dos Santos,&nbsp;Dértia Villalba Freire-Maia","doi":"10.1186/1477-5751-11-16","DOIUrl":"https://doi.org/10.1186/1477-5751-11-16","url":null,"abstract":"<p><strong>Background: </strong>Mental retardation (MR) is a heterogeneous condition that affects 2-3% of the general population and is a public health problem in developing countries. Chromosomal abnormalities are an important cause of MR and subtelomeric rearrangements (STR) have been reported in 4-35% of individuals with idiopathic MR or an unexplained developmental delay, depending on the screening tests and patient selection criteria used. Clinical checklists such as that suggested by de Vries et al. have been used to improve the predictive value of subtelomeric screening.</p><p><strong>Findings: </strong>Fifteen patients (1-20 years old; five females and ten males) with moderate to severe MR from a genetics outpatient clinic of the Gaffrée and Guinle Teaching Hospital (HUGG) of the Federal University of Rio de Janeiro State (UNIRIO) were screened with Multiprobe T FISH after normal high resolution karyotyping. No subtelomeric rearrangements were detected even though the clinical score of the patients ranged from four to seven.</p><p><strong>Conclusion: </strong>In developing countries, FISH-based techniques such as Multiprobe T FISH are still expensive. Although Multiprobe T FISH is a good tool for detecting STR, in this study it did not detect STR in patients with unexplained MR/developmental delay even though these patients had a marked chromosomal imbalance. Our findings also show that clinical scores are not reliable predictors of STR.</p>","PeriodicalId":73849,"journal":{"name":"Journal of negative results in biomedicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/1477-5751-11-16","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31140289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Could titanium oxide coating from a sol-gel process make stone baskets more resistant to laser radiation at 2.1 μm? 溶胶-凝胶工艺产生的氧化钛涂层能否使石篮更耐受 2.1 μm 激光辐射?
Journal of negative results in biomedicine Pub Date : 2012-10-19 DOI: 10.1186/1477-5751-11-15
Jens Cordes, Felix Nguyen, Frank Heidenau, Dieter Jocham
{"title":"Could titanium oxide coating from a sol-gel process make stone baskets more resistant to laser radiation at 2.1 μm?","authors":"Jens Cordes, Felix Nguyen, Frank Heidenau, Dieter Jocham","doi":"10.1186/1477-5751-11-15","DOIUrl":"10.1186/1477-5751-11-15","url":null,"abstract":"<p><strong>Background: </strong>Stone baskets could be easily destroyed by Holmium:YAG-laser at an endourologic treatment, with respect to this, we try to improve the resistance by coating them with a titanium oxide layer. The layer was established by a sol-gel-process.</p><p><strong>Materials and methods: </strong>Six new baskets (Equadus, Opi Med, Ettlingen, Germany) were used: 1.8 Ch. with 4 wires (diameter 0.127 mm). Three baskets were coated with a layer of titanium oxide established by a sol-gel process at the BioCerEntwicklungs GmbH in Bayreuth (~100 nanometres thickness). The lithotripter was a Holmium:YAG laser (Auriga XL, Starmedtec, Starnberg, Germany). 10 uncoated and 10 coated wires were tested with 610 mJ (the minimal clinical setting) and 2 uncoated and 2 coated wires were tested with 110 mJ. The wires were locked in a special holding instrument under water and the laser incident angle was 90°. The endpoint was gross visible damage to the wire and loss of electric conduction.</p><p><strong>Results: </strong>Only two coated wires resisted two pulses (one in the 610 mJ and one in the 110 mJ setting). All other wires were destroyed after one pulse.</p><p><strong>Conclusion: </strong>This was the first attempt at making stone baskets more resistant to a Holmium:YAG laser beam. Titanium oxide deposited by a sol-gel-process on a titanium-nickel alloy did not result in better resistance to laser injuries.</p>","PeriodicalId":73849,"journal":{"name":"Journal of negative results in biomedicine","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3599394/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30991207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of 60 minutes of hyperoxia followed by normoxia before coronary artery bypass grafting on the inflammatory response profile and myocardial injury. 冠状动脉搭桥术前高氧后常氧60分钟对炎症反应和心肌损伤的影响。
Journal of negative results in biomedicine Pub Date : 2012-09-14 DOI: 10.1186/1477-5751-11-14
Inga Karu, Peeter Tähepõld, Arno Ruusalepp, Kersti Zilmer, Mihkel Zilmer, Joel Starkopf
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引用次数: 11
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