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Siena S, Demetri G, Doebele R, Chae Y, Conkling P, Garrido-Laguna I, Garrido P, Rolfo C, Sigal D, Eng S, Simmons B, Ye C, Ciardiello F. Entrectinib in NTRK-fusion positive gastrointestinal cancers: integrated analysis of patients enrolled in three trials (STARTRK-2, STARTRK-1, and ALKA-372-001). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz154.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Barlesi F, Drilon A, De Braud F, Cho B, Ahn M, Siena S, Krebs M, Lin C, John T, Tan D, Seto T, Dziadziuszko R, Arkenau HT, Rolfo C, Wolf J, Ye C, Riehl T, Eng S, Doebele R. Entrectinib in locally advanced or metastatic ROS1 fusion-positive non-small cell lung cancer (NSCLC): Integrated analysis of ALKA-372-001, STARTRK-1 and STARTRK-2. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz063.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Miao E, Eng S, Lee C, Seetharamu N, Sullivan K. P2.13-38 Impact of Tyrosine Kinase Inhibitor (TKI) Dose on Outcomes of Patients with Lung Cancer. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abignano G, Blagojevic J, Bissell LA, Dumitru R, Eng S, Calder N, Messenger M, Buch M, Emery P, Del Galdo F. FRI0239 Complementary Value of ELF Test and NT-proBNP in Reflecting Fibrosis and Vasculopathy in Systemic Sclerosis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Faulkner D, Britton J, Eng S, Del Galdo F, Stark D, Buch M. FRI0272 Evaluation of Bleomycin Induced Raynaud's Phenomenon and Systemic Sclerosis Vasculopathy in Germ Cell Tumour Patients. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Lettieri G, Abignano G, Eng S, Britton J, Ridgway J, Evans R, Rathbone A, O'Connor P, Emery P, Buch M, Del Galdo F. FRI0466 Digital Artery Flow Index by Non-Contrast Magnetic Resonance Angiography of the Hand: A Quantitative Outcome Measure of Fibroproliferative Vasculopathy in Raynaud's Phenomenon of Scleroderma. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.6045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Absolom K, Hector C, Campbell L, Eng S, Taylor S, Takeuchi E, Warrington L, Ziegler L, Velikova G. Using the measure of patient centred communication to assess oncology consultations. BMJ Support Palliat Care 2011. [DOI: 10.1136/bmjspcare-2011-000020.59] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Eng S, Velikova G. Development of guidelines for the management of cancer related fatigue. BMJ Support Palliat Care 2011. [DOI: 10.1136/bmjspcare-2011-000020.70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Menzella HG, Tran TT, Carney JR, Lau-Wee J, Galazzo J, Reeves CD, Carreras C, Mukadam S, Eng S, Zhong Z, Timmermans PBMWM, Murli S, Ashley GW. Potent Non-Benzoquinone Ansamycin Heat Shock Protein 90 Inhibitors from Genetic Engineering of Streptomyces hygroscopicus. J Med Chem 2009; 52:1518-21. [DOI: 10.1021/jm900012a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hugo G. Menzella
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
| | - Thomas-Toan Tran
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
| | - John R. Carney
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
| | - Janice Lau-Wee
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
| | - Jorge Galazzo
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
| | | | - Christopher Carreras
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
| | - Sophie Mukadam
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
| | - Sara Eng
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
| | - Ziyang Zhong
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
| | | | - Sumati Murli
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
| | - Gary W. Ashley
- Kosan Biosciences Incorporated, 3832 Bay Center Place, Hayward, California 94545
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Eng S, Sanne I, Badal-Faesen S, Wood R, Rajicic N, Tressler R. Prevalence of CCR5-tropic HIV-1 among treatment-experienced individuals in South Africa infected with Clade C virus. J Int AIDS Soc 2008. [DOI: 10.1186/1758-2652-11-s1-p198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Berwick M, Orlow I, Mahabir S, Myskowski P, Coit D, Brady MS, Roy P, Song Y, Canchola R, Barz A, Halpern A, Bolognia J, Eng S, Elahi A, Begg CB. Estimating the relative risk of developing melanoma in INK4A carriers. Eur J Cancer Prev 2004; 13:65-70. [PMID: 15075790 DOI: 10.1097/00008469-200402000-00010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Estimation of the relative risk of cancer due to rare germline mutations using population-based epidemiological techniques is challenging, since studies with very large numbers of subjects are required. In this pilot study using a novel study design, we evaluated the role of INK4A mutations in melanoma by comparing patients with multiple primary melanomas to those with single primaries. Patients were ascertained from the Surgery and Dermatology Clinics at Memorial Sloan-Kettering Cancer Center and at the Yale University Pigmented Lesion Clinic. Subjects completed a questionnaire covering risk factors for melanoma and were tested for INK4A mutations. Five (8%) of 65 patients with multiple primaries had a mutation, compared with none of 88 patients with single primaries (P=0.03). Examination of other factors, such as number of nevi on the arms of the patients, fair skin, hair and eye colour, and other phenotypic characteristics associated with the risk of melanoma, demonstrates that these factors exhibit higher prevalence in the multiple primary cases than in the single primaries. These results provide evidence of the utility of the new study design in evaluating the impact of rare but highly penetrant cancer risk factors.
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Affiliation(s)
- M Berwick
- Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA
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Affiliation(s)
- S Eng
- Department of Medicine, Division of Endocrinology, Diabetes & Metabolism, University of California, Irvine, Irvine, CA, USA
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Brody RI, Eng S, Melamed J, Mizrachi H, Schneider RJ, Tobias H, Teperman LW, Theise ND. Immunohistochemical detection of hepatitis C antigen by monoclonal antibody TORDJI-22 compared with PCR viral detection. Am J Clin Pathol 1998; 110:32-7. [PMID: 9661920 DOI: 10.1093/ajcp/110.1.32] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We sought to determine the sensitivity and specificity of immunohistochemistry using the TORDJI-22 MoAb (BioGenex, San Ramon, Calif), which is specific for the C-100 protein of the hepatitis C virus, compared with reverse transcriptase-polymerase chain reaction (RT-PCR) of tissue for viral RNA. RT-PCR had been performed on 52 fixed tissue specimens. Immunohistochemistry was performed using prediluted antibody with the alkaline phosphatase/fast red (BioGenex) technique. Predigestion with Protease XXIV (BioGenex) and other procedures followed the manufacturer's protocols. Positive immunohistochemistry was narrowly defined as tightly clumped, perinuclear red granules in hepatocytes. Of the specimens, 28 were positive by RT-PCR. With RT-PCR as the standard of comparison, immunohistochemistry yielded a sensitivity of 70% and specificity of 84%. Positive cells, when present, were usually very rare. With stringent criteria, immunohistochemistry with the TORDJI-22 monoclonal antibody is a very specific, fairly sensitive diagnostic test for hepatitis C virus in fixed liver tissues.
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Affiliation(s)
- R I Brody
- Department of Pathology, New York University Medical Center, New York 10016, USA
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Abstract
Previous work has demonstrated that drugs which inhibit Na+ entry through voltage-sensitive Na+ channels, or via Na(+)-H+ exchange protect the heart from ischemic reperfusion damage. The purpose of our study was to determine whether these drugs in combination will have an additive protective effect in Langendorff-perfused hearts. During reperfusion following 30 min of ischemia, developed tension and resting tension were 24 +/- 3 and 162 +/- 5%, respectively, of pre-ischemic values in non-treated ischemic hearts. The administration of HOE-642 to inhibit Na+/H+ exchange increased active developed tension (DT) to 58 +/- 2% of pre-ischemic levels and decreased resting tension (RT) to 111 +/- 3% of pre-ischemic levels. The administration of tetrodotoxin (TTX) to block the Na+ channel increased DT to 56 +/- 3% of the pre-ischemic level and reduced the RT to 126 +/- 12% of the pre-ischemic level. Together, HOE-642 and TTX increased recovery of DT to 63 +/- 2% of pre-ischemic levels and improved RT to 116 +/- 4% of pre-ischemic levels after 30 min of reperfusion. All drug treatment protocols significantly lowered the creatine phosphokinase activity measured in the coronary effluent in comparison to that observed in the non-treated hearts. These data demonstrate that inhibition of Na+ entry through either Na(+)-H+ exchange or the Na+ channel protects the heart from ischemic injury, but there is no additional benefit of blocking both routes of Na+ entry simultaneously. This suggests that a threshold level of Na+i may be a critical factor in ischemic cardioprotection.
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Affiliation(s)
- S Eng
- Division of Stroke and Vascular Disease, St. Boniface General Hospital Research Centre, Winnipeg, Manitoba, Canada
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Silverberg LI, Eng S. Dietary controls produce positive results for a non-insulin-dependent diabetes mellitus patient. Md Med J 1998; 47:72-3. [PMID: 9524414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Renal disease is a leading cause of death and disability for diabetic patients. Diabetic nephropathy is responsible for half of the cases of end-stage renal disease in the United States. For non-insulin-dependent diabetes mellitus patients, the prevalence of diabetic nephropathy varies from 15% to 60% and is influenced by genetic background. Early screening and controlling of microalbumin levels are essential to affect the outcome of diabetic nephropathy. Studies show that clinical renal dysfunction in diabetics does not correlate well with the histological abnormalities. Strategies for nephropreservation include close lipid, glycemic, and blood pressure control, and tobacco termination. Use of angiotensin-converting enzyme inhibitors exert nephroprotective effects beyond their beneficial blood pressure-lowering effects. The importance of strict diet is emphasized in a case presentation.
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Yamagata K, Takeda J, Menzel S, Chen X, Eng S, Lim LR, Concannon P, Hanis CL, Spielman RS, Cox NJ, Bell GI. Searching for NIDDM susceptibility genes: studies of genes with triplet repeats expressed in skeletal muscle. Diabetologia 1996; 39:725-30. [PMID: 8781769 DOI: 10.1007/bf00418545] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The expansion of trinucleotide repeats has been associated with late-onset neurodegenerative disorders. Although the genes harbouring the triplet expansions may be widely expressed, the pathological expression of these diseases is restricted to specific tissues. Non-insulin-dependent diabetes mellitus (NIDDM) shares several features with diseases resulting from such dynamic mutations including late-onset and specific but limited sites of tissue pathology-muscle, fat, liver and insulin-secreting pancreatic beta cells. In order to examine the contribution of genes containing polymorphic CAG/CTG repeats to the development of NIDDM, we screened an adult human skeletal muscle cDNA library for expressed sequences containing tandem repeats of CAG and/ or CTG. Ten different loci with polymorphic CAG/ CTG repeats were identified, of which seven had a heterozygosity greater than 0.20. There was no evidence for linkage between these seven loci and NIDDM in a group of affected Mexican-American sib pairs. Nor was there a significant difference in the distribution of alleles between Caucasian patients with NIDDM and normal healthy control subjects or evidence for repeat expansion in diabetic subjects. Thus, muscle genes with polymorphic CAG/CTG repeats do not appear to play a significant role in the development of NIDDM.
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Affiliation(s)
- K Yamagata
- Howard Hughes Medical Institute, University of Chicago
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Bell A, Gill R, Isaac-Renton J, King A, Martinez L, Roscoe D, Werker D, Eng S, Johnstone T, Stanwick R. Outbreak of toxoplasmosis associated with municipal drinking water--British Columbia. The British Columbia Toxoplasmosis Team. Can Commun Dis Rep 1995; 21:161-3; discussion 163-4. [PMID: 8547919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Takeda J, Espinosa R, Eng S, Le Beau MM, Bell GI. Chromosomal assignment and tissue distribution of novel expressed sequence tags from a human pancreatic islet cDNA library. Genomics 1995; 29:276-81. [PMID: 8530086 DOI: 10.1006/geno.1995.1245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
One hundred novel cDNAs from a human pancreatic islet library have been mapped using PCR and DNA from a human-rodent somatic cell hybrid mapping panel and/or fluorescence in situ hybridization. In addition, the pattern of expression of 54 of these cDNAs has been determined by RNA blotting.
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Affiliation(s)
- J Takeda
- Department of Medicine, University of Chicago, Illinois 60637, USA
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Abstract
The islets of Langerhans play a central role in glucose homeostasis by secreting the polypeptide hormones insulin and glucagon. They are comprised primarily of four endocrine cell types: insulin-secreting beta-cells which represent about 70% of the cells in the islet along with smaller number of cells secreting glucagon, somatostatin and pancreatic polypeptide. Diabetes mellitus results from the specific loss or dysfunction of the beta-cells. Because of the central role of the islets of Langerhans in the regulation of glucose homeostasis, we are preparing a database of genes expressed in this tissue. One thousand cDNA clones randomly isolated from a human pancreatic islet library were partially sequenced yielding 280 kilobases of sequence. Database searches indicated that 397 of the cDNAs represented known human genes or human homologs of genes identified in other species and a further 58 sequences corresponded to expressed sequence tags identified in other tissues or cells (contamination by exocrine pancreatic tissue was estimated to be less than 10%). 545 of the cDNAs were not related to any other sequences in the databases. The islet cDNA collection provides a unique source of genes for genetic studies of diabetes as well as for molecular studies of islet function in normal and diabetic states.
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Affiliation(s)
- J Takeda
- Howard Hughes Medical Institute, University of Chicago, IL 60637
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Balla T, Baukal AJ, Eng S, Catt KJ. Angiotensin II receptor subtypes and biological responses in the adrenal cortex and medulla. Mol Pharmacol 1991; 40:401-6. [PMID: 1654513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Angiotensin II (AII) receptor subtypes and their potential coupling mechanisms were studied using recently developed peptide and nonpeptide antagonists in rat and bovine adrenal zona glomerulosa cells, as well as in membranes prepared from rat and bovine adrenal cortex and medulla. Comparison of the potencies of these novel antagonists to displace 125I-[Sar1,Ile8]AII from its binding sites revealed two distinct AII binding sites in membranes prepared from rat adrenal capsules (zona glomerulosa) and from rat adrenal inner zones containing the medulla. About 85% of the binding sites of the glomerulosa zone and 30% of those of the inner zones were of the AT1 subtype, with relative affinities for the nonpeptide antagonists Dup 753 and PD 123177 and the peptide antagonist CGP 42112A in the order of Dup 753 much greater than CGP 42112A greater than PD 123177. In contrast, the relative binding potencies for the other (AT2) population of binding sites were CGP 42112A greater than PD 123177 much greater than Dup 753. Neither AII nor its peptide antagonist [Sar1,Ile8]AII could distinguish between the two sets of binding sites. The effects of the new antagonists on functional responses of rat adrenal glomerulosa cells demonstrated that both AII-stimulated aldosterone production and the AII-induced inhibition of adrenocorticotropic hormone-stimulated cAMP formation were mediated by the AT1 receptor subtype. In bovine adrenals, only AT1 receptors were detected in membranes prepared from the cortex and the medulla, as well as in cultured glomerulosa cells. The relative inhibitory potency of Dup 753 was lower by an order of magnitude at bovine than at rat AT1 receptors. The inhibition of AII-induced aldosterone production by the various antagonists was closely correlated with their inhibitory potencies on 125I-[Sar1,Ile8]AII binding to bovine glomerulosa cells. These data suggest that the known effects of AII in adrenal glomerulosa cells are mediated through the AT1 receptor subtype and that the distribution and/or specificity of the AT2 receptors shows marked species variations.
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Affiliation(s)
- T Balla
- Endocrinology and Reproduction Research Branch, National Institutes of Child Health, National Institutes of Health, Bethesda, Maryland 20892
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Johnstone T, Marchenski M, Hines W, Davis J, Eng S, Gibson G, Peck SH. Outbreak of gastroenteritis associated with drinking well water--British Columbia. Can Dis Wkly Rep 1991; 17:111-2. [PMID: 1868581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- T Johnstone
- Capital Regional District Health Protection and Environment Office, Victoria, British Columbia
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Hartstein AI, Morthland VH, Eng S, Archer GL, Schoenknecht FD, Rashad AL. Restriction enzyme analysis of plasmid DNA and bacteriophage typing of paired Staphylococcus aureus blood culture isolates. J Clin Microbiol 1989; 27:1874-9. [PMID: 2527867 PMCID: PMC267688 DOI: 10.1128/jcm.27.8.1874-1879.1989] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
We compared restriction enzyme analysis of plasmid (REAP) DNA profiling with bacteriophage typing for determination of similarities and differences among 50 pairs of Staphylococcus aureus blood isolates from patients with multiple positive blood cultures. Isolates from 17 pairs did not have detectable plasmids. Isolates from 33 pairs had plasmids classified into 17 distinct REAP DNA profiles. Paired isolates from 31 of these episodes were identical to one another. By phage typing, 35 pairs had strong lytic reactions to a phage(s), 9 pairs lacked strong reactions, and 6 pairs consisted of a strongly reactive isolate and an isolate with no strong reaction to a phage. When consolidated into 11 general phage groups, pairs from 44 of the 50 episodes were in the same general group. REAP DNA profiles were highly reproducible (99%), whereas phage typing was not. REAP DNA profiling is superior to phage typing as a technique for determining similarities and differences among S. aureus blood isolates.
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Affiliation(s)
- A I Hartstein
- Department of Hospital Infection Control, University Hospitals, Portland, Oregon 97201
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Hofmann T, Eng S, Lilja H, Drakenberg T, Vogel HJ, Forsén S. Site-site interactions in EF-hand calcium-binding proteins. Laser-excited europium luminescence studies of 9-kDa calbindin, the pig intestinal calcium-binding protein. Eur J Biochem 1988; 172:307-13. [PMID: 3349999 DOI: 10.1111/j.1432-1033.1988.tb13888.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Europium(III) binding to 9-kDa calbindin from pig intestines was studied by direct excitation of the 7Fo----5Do transition of the ion and by near-ultraviolet circular dichroic spectroscopy. Europium(III) binding is clearly biphasic. As with other lanthanides the C-terminal metal-binding site (site II) is filled first. The europium ion in this site gives an excitation spectrum with a single peak at 579.1 nm (peak 2). The occupation of the N-terminal site (site I) by europium gives excitation spectra that are pH-dependent and show a peak at 579.4 nm (peak 1a) at pH 5 which shifts to 578.7 nm (peak 1b) over the pH range 5-7. At pH 8.07 the fluorescence from europium in site I largely disappears because of weak binding, whereas that from site II is quenched by about 75% in spite of full occupancy of the site as shown by circular dichroic titration. There is a strong interaction between the two sites in spite of the very different affinities. The fluorescence from site II increases stoichiometrically with the addition not only of the first equivalent of europium, but also concomitantly with the fluorescence from site I upon addition of the second equivalent. Furthermore, when Eu1-calbindin is titrated with calcium the fluorescence at 579.1 nm is quenched by about 30% during the addition of one equivalent of calcium which fills site I. Subsequent titration with large excesses of calcium displaces europium from site II. The affinity of site II for europium is about 100 times that of calcium under these conditions.
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Affiliation(s)
- T Hofmann
- Department of Biochemistry, University of Toronto, Ontario, Canada
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Campbell J, Bibb WF, Lambert MA, Eng S, Steigerwalt AG, Allard J, Moss CW, Brenner DJ. Legionella sainthelensi: a new species of Legionella isolated from water near Mt. St. Helens. Appl Environ Microbiol 1984; 47:369-73. [PMID: 6712210 PMCID: PMC239676 DOI: 10.1128/aem.47.2.369-373.1984] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Six strains of a new species, Legionella sainthelensi, were isolated from freshwater in areas affected by the volcanic eruptions of Mt. St. Helens in the state of Washington. Strains of L. sainthelensi are culturally and biochemically similar to other legionellae. They grow on buffered charcoal yeast agar but not on media that lack cysteine. They are gram-negative, nonsporeforming, motile rods that are positive in reactions for catalase, oxidase, gelatin liquefaction, and beta-lactamase. They are negative in reactions for urease, hydrolysis of hippurate, reduction of nitrates, fermentation of glucose, and blue-white autofluorescence. Their cell wall fatty acid composition is qualitatively similar to those of other legionellae, with 50 to 62% branched-chain fatty acids. They contain the isobranched-chain 14- and 16-carbon acids and anteisobranched-chain 15- and 17-carbon acids and relatively large amounts of straight-chain 16-carbon acid. All strains of L. sainthelensi contain approximately equal amounts of ubiquinones Q9, Q10, Q11, and Q12, a pattern similar to those of Legionella bozemanii, Legionella dumoffi, and Legionella longbeachae. Serological cross-reactions were observed between L. sainthelensi, both serogroups of L. longbeachae, and Legionella oakridgensis. Three strains of L. sainthelensi were greater than 90% related by DNA hybridization. The type strain of L. sainthelensi, Mt. St. Helens 4, was 36% related to the type strain of L. longbeachae and 3 to 14% related to the other nine described Legionella species.
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Eng S, Woo GC. Reading addition determination with several luminance levels and target configurations. Am J Optom Physiol Opt 1982; 59:701-5. [PMID: 7137312 DOI: 10.1097/00006324-198209000-00001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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McGonagle LA, Schmidt G, Eng S, Wirsing K. A space-saving media table. J Clin Microbiol 1975; 2:67-9. [PMID: 1225930 PMCID: PMC274127 DOI: 10.1128/jcm.2.1.67-69.1975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
A space-saving media table designed to facilitate pouring large quantities of plated media in a small area is described.
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Solo AJ, Eng S, Singh B. Bridged D-ring steroid analogs. XII. Effect of D-ring substituents on chemical shift of angular methyl protons. J Pharm Sci 1973; 62:1471-5. [PMID: 4743095 DOI: 10.1002/jps.2600620917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Solo AJ, Eng S, Singh B. Ring-D-bridged steroid analogs. X. Synthesis and nuclear magnetic resonance spectral properties of 3 -acetoxy-14 ,17 -ethano-5,15-pregnadien-20-one, 3 -acetoxy-14 ,17 -ethano-5-pregnen-20-one, and 3 -acetoxy-16,16'-cyclo-14 ,17 -ethano-5-pregnen-20-one. J Org Chem 1972; 37:3542-3. [PMID: 5077646 DOI: 10.1021/jo00795a034] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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