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31.
Julia E. Heck Travis J. Meyers Christina Lombardi Andrew S. Park Myles Cockburn Peggy Reynolds Beate Ritz 《Cancer epidemiology》2013,37(4):390-395
Background: Hepatoblastoma is a malignant embryonal tumor typically diagnosed in children younger than five years of age. Little is known on hepatoblastoma etiology. Methods: We matched California Cancer Registry records of hepatoblastomas diagnosed in children younger than age 6 from 1988 to 2007 to birth records using a probabilistic record linkage program, yielding 261 cases. Controls (n = 218,277), frequency matched by birth year to all cancer cases in California for the same time period, were randomly selected from California birth records. We examined demographic and socioeconomic information, birth characteristics, pregnancy history, complications in pregnancy, labor and delivery, and abnormal conditions and clinical procedures relating to the newborn, with study data taken from birth certificates. Results: We observed increased risks for hepatoblastoma among children with low [1500–2499 g, Odds Ratio (OR) = 2.02, 95% confidence interval (CI) 1.29–3.15] and very low birthweight (<1500 g, OR = 15.4, 95% CI 10.7–22.3), preterm birth <33 weeks (OR = 7.27, 95% CI 5.00, 10.6), small size for gestational age (OR = 1.75, 95% CI 1.25–2.45), and with multiple birth pregnancies (OR = 2.52, 95% CI 1.54–4.14). We observed a number of pregnancy and labor complications to be related to hepatoblastoma, including preeclampsia, premature labor, fetal distress, and congenital anomalies. Conclusion: These findings confirm previously reported associations with low birthweight and preeclampsia. The relation with multiple birth pregnancies has been previously reported and may indicate a relation to infertility treatments. 相似文献
32.
Saeedeh Azary Arupa Ganguly Greta R. Bunin Christina Lombardi Andrew S. Park Beate Ritz Julia E. Heck 《PloS one》2016,11(3)
Background
Retinoblastoma is the most frequent tumor of the eye in children and very little is known about the etiology of non-familial (sporadic) retinoblastoma. In this study we examined whether parental tobacco smoking or alcohol consumption (pre- or post-conception) contribute to the two phenotypes (bilateral or unilateral) of sporadic retinoblastoma.Methods
Two large multicenter case-control studies identified 488 cases through eye referral centers in the United States and Canada or through the Children’s Oncology Group. Controls (n = 424) were selected from among friends and relatives of cases and matched by age. Risk factor information was obtained via telephone interview. We employed multivariable logistic regression to estimate the effects of parental tobacco smoking and alcohol consumption on retinoblastoma.Findings
Maternal smoking before and during pregnancy contributed to unilateral retinoblastoma risk in the child: year before pregnancy conditional Odds Ratio (OR), 8.9; 95% confidence interval (CI) 1.5–51, and unconditional OR, 2.4; 95% CI, 1.3–4.7; month before or during pregnancy, conditional OR, 3.3; 95% CI, 0.5–20.8, and unconditional OR, 2.8; 95% CI, 1.1–7.0. No association was found for maternal or paternal alcohol consumption.Conclusion
The results of this study indicate that maternal active smoking during pregnancy may be a risk factor for sporadic retinoblastoma. Our study supports a role for tobacco exposures in embryonal tumors. 相似文献33.
34.
35.
Hydrophobic interaction chromatography is a very popular chromatography method for purification of proteins and plasmids in all scales from analytical to industrial manufacturing. Despite this frequent use, the complex interaction mechanism and the thermodynamic aspects of adsorption in hydrophobic interaction chromatography are still not well understood. Calorimetric methods such as isothermal titration calorimetry and flow calorimetry can help to gain a deeper understanding of the adsorption strength, the influence of salt type and temperature. They can be used to study conformational changes of proteins, which are often associated with the adsorption in hydrophobic interaction chromatography. This review offers a detailed introduction into the thermodynamic fundamentals of adsorption in hydrophobic interaction chromatography with a special focus on the potential applications of isothermal titration calorimetry and flow calorimetry for studying specific problems and relationships of the adsorption behavior of proteins and its various influencing factors. Models for characterizing conformational changes upon adsorption are presented together with methods for assessing this problem for different proteins and stationary phases. All of this knowledge can contribute greatly to forming a sound basis for method development, process optimization and finding modelling strategies in hydrophobic interaction chromatography. 相似文献
36.
A straightforward machine-assisted protocol for the synthesis of linear depsipeptides is reported. The synthesis was performed on a 433A Peptide Synthesizer (Applied Biosystems) using preprogrammed and optimized modules for Boc chemistry and without any need for hardware modification. The robustness of the protocol was demonstrated with 12 examples of 26-membered depsipeptides with single and multiple (up to 6) ester backbone substitutions. 相似文献
37.
Profiling phosphoproteins of yeast mitochondria reveals a role of phosphorylation in assembly of the ATP synthase 总被引:1,自引:0,他引:1
Reinders J Wagner K Zahedi RP Stojanovski D Eyrich B van der Laan M Rehling P Sickmann A Pfanner N Meisinger C 《Molecular & cellular proteomics : MCP》2007,6(11):1896-1906
Mitochondria are crucial for numerous cellular processes, yet the regulation of mitochondrial functions is only understood in part. Recent studies indicated that the number of mitochondrial phosphoproteins is higher than expected; however, the effect of reversible phosphorylation on mitochondrial structure and function has only been defined in a few cases. It is thus crucial to determine authentic protein phosphorylation sites from highly purified mitochondria in a genetically tractable organism. The yeast Saccharomyces cerevisiae is a major model organism for the analysis of mitochondrial functions. We isolated highly pure yeast mitochondria and performed a systematic analysis of phosphorylation sites by a combination of different enrichment strategies and mass spectrometry. We identified 80 phosphorylation sites in 48 different proteins. These mitochondrial phosphoproteins are involved in critical mitochondrial functions, including energy metabolism, protein biogenesis, fatty acid metabolism, metabolite transport, and redox regulation. By combining yeast genetics and in vitro biochemical analysis, we found that phosphorylation of a serine residue in subunit g (Atp20) regulates dimerization of the mitochondrial ATP synthase. The authentic phosphoproteome of yeast mitochondria will represent a rich source to uncover novel roles of reversible protein phosphorylation. 相似文献
38.
Stöhr H Klein J Gehrig A Koehler MR Jurklies B Kellner U Leo-Kottler B Schmid M Weber BH 《Human genetics》1999,104(1):99-105
The family of diacylglycerol kinases (DAGKs) is known to play an important role in signal transduction linked to phospholipid
turnover. In the fruitfly Drosophila melanogaster, a human DAGK ortholog, DGK2, was shown to underlie the phenotype of the visual mutant retinal degeneration A (rdgA). Previously, the gene encoding a novel member of the human DAGK family, termed DAGK3, was cloned and demonstrated to be abundantly expressed in the human retina. Based on these findings we reasoned that DAGK3 might be an excellent candidate gene for a human eye disease. In the present study, we report the genomic organization of
the human DAGK3 gene, which spans over 30 kb of genomic DNA interrupted by 23 introns. In addition, we have mapped the gene locus by fluorescence
in situ hybridization to 3q27–28, overlapping the chromosomal region known to contain the gene underlying dominant optic atrophy
(OPA1), the most common form of hereditary atrophy of the optic nerve. Mutational analysis of the entire coding region of
DAGK3 in 19 unrelated German OPA1 patients has not revealed any disease-causing mutations, therefore excluding DAGK3 as a major cause underlying OPA1.
Received: 24 August 1998 / Accepted: 13 October 1998 相似文献
39.
Dmitry?N.?TychininEmail author Almut?Beate?HeinrichEmail author 《The International Journal of Life Cycle Assessment》2004,9(2):73-73
Acknowledgement Thanks are due to Drs. Paul Johnston (P.Johnston@ exeter.ac.uk) and E. William Beese (ebeese@t-online.de) for kindly providing
dictionary definitions and for sharing their thoughts about the correct use of ‘data’. 相似文献
40.
Schobess R Kempf-Bielack B Schwabe D Sträter R Nowak-Göttl U 《Reviews in clinical and experimental hematology》2004,8(1):E2
This review is based on pediatric reports (- January 2004) on the presence of symptomatic thrombosis in children with hematologic malignancies, mainly acute lymphoblastic leukemia, treated with different treatment protocols and associated with acquired and inherited prothrombotic risk factors (factor V G1691A, factor G20210A, MTHFR C677T genotypes, protein C, protein S, antithrombin, elevated levels of lipoprotein(a), and homocysteine). The interactions of treatment modalities, study designs, ethnical backgrounds and associated central lines are discussed. Based on the data presented here, we suggest the use of prednisone and E. coli asparaginase concomitantly administered in a leukemic patient suffering a prothrombotic risk factor to be responsible for the onset of venous thrombosis in the majority of cases. In addition, primary preventive anticoagulant/antithrombotic strategies are discussed. 相似文献