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Kim E, Alvarez L, Arnell T, Brejt S, Cooper C, Reis S, Schlossberg P, Sheynzon V, Sobolevsky S, Sperling D, Susman J, Tulin-Silver S, Weintraub J, Mobley D. 03:09 PM Abstract No. 307 The efficacy of culturing bile when placing percutaneous cholecystostomy tubes for acute cholecystitis. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.374] [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: 11/30/2022] Open
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Gioioso V, Reis S, Brejt S, Tulin-Silver S, Sperling D, Susman J, Weintraub J, Mobley D. Abstract No. 582 Microwave ablation of osteoid osteoma: safety and efficacy. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Abstract
Amoxicillin has become a major antimicrobial substance in pig medicine for the treatment and control of severe, systemic infections such as Streptococcus suis. The minimum inhibitory concentration 90% (MIC 90) is 0.06 μg amoxicillin/ml, and the proposed epidemiological cut-off value (ECOFF) is 0.5 μg/ml, giving only 0.7% of isolates above the ECOFF or of reduced susceptibility. Clinical breakpoints have not been set for amoxicillin against porcine pathogens yet, hence the use of ECOFFs. It has also been successfully used for bacterial respiratory infections caused by Actinobacillus pleuropneumoniae and Pasteurella multocida. The ECOFF for amoxicillin against A. pleuropneumoniae is also 0.5 μg/ml demonstrating only a reduced susceptibility in 11.3% of isolates. Similarly, P. multocida had an ECOFF of 1.0 μg/ml and a reduced susceptibility in only 2.6% of isolates. This reduced susceptibility disappears when combined with the beta-lactamase inhibitor, clavulanic acid, demonstrating that it is primarily associated with beta-lactamase production. In contrast, amoxicillin is active against Escherichia coli and Salmonella species but using ECOFFs of 8.0 and 4.0 μg/ml, respectively, reduced susceptibility can be seen in 70.9% and 67.7% of isolates. These high levels of reduced susceptibility are primarily due to beta-lactamase production also, and most of this resistance can be overcome by the combination of amoxicillin with clavulanic acid. Currently, amoxicillin alone is considered an extremely valuable antimicrobial in both human and animal medicine and remains in the critically important category of antibiotics alongside the fluoroquinolones and macrolides by the World Health Organization as well as the third- and fourth-generation cephalosporins, but these cephalosporins show marked resistance to basic beta-lactamase production and are only destroyed by the extended-spectrum beta-lactamases. Amoxicillin alone and in combination with clavulanic acid are currently classed together in Category 2 in the European Union. By reviewing the pharmacodynamic data and comparing this with pharmacokinetic data from healthy and infected animals and clinical trial data, it can be seen that the product has a good efficacy against S. suis and A. pleuropneumoniae, in spite of usage over many years. However, it may be much less efficacious on its own against E. coli, due to reduced susceptibility and resistance associated with beta-lactamase production, which is largely overcome by the use of clavulanic acid. It is felt that this differentiation may be useful in future classification of amoxicillin alone, in comparison with its combined use with clavulanic acid and thereby preserve the use of the more critically important antibiotics in veterinary medicine and reducing the risk of their resistance being transmitted to human.
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Affiliation(s)
- D G S Burch
- Octagon Services Ltd, Windsor, Berkshire, UK
| | - D Sperling
- Ceva Sante Animale, Libourne Cedex, Bordeaux, France
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Dubois B, Wilcox C, Weintraub J, Susman J, Sperling D, Sheynzon V, Schlossberg P, Chheang S, Reis S, Mobley D. Efficacy and safety of partial splenic embolization in patients with splenomegaly associated cytopenias. J Vasc Interv Radiol 2017. [DOI: 10.1016/j.jvir.2016.12.755] [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: 10/20/2022] Open
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Hanna RF, Hao F, Kraus CF, Mitsopoulos G, Goldstein GE, Weintraub J, Sperling D, Susman J, Schlossberg P, Sheynzon V. Renal Transplant Arterial Stenosis Treated With Bare-Metal Versus Drug-Eluting Stents: Comparison of Treatment Outcomes. Transplant Proc 2016; 47:2881-5. [PMID: 26707307 DOI: 10.1016/j.transproceed.2015.09.062] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 09/17/2015] [Indexed: 12/15/2022]
Abstract
INTRODUCTION This study aims to evaluate outcomes of bare-metal stents (BMS) versus drug-eluting stents (DES) in patients who undergo stenting for transplant renal arterial stenosis. MATERIALS AND METHODS We retrospectively reviewed records of renal transplantation patients who underwent transplant renal arterial stenting from September 2009 to September 2013. All stents greater than 5 mm were excluded to allow for equivalent comparison between the DES and BMS groups. Statistical comparisons were performed using a two-tailed Fischer exact test, and analysis of continuous variables was analyzed using a one-way analysis of variance. RESULTS The final study population included a total of 18 patients who received either BMS or DES (11 and 7 patients, respectively) for transplant renal arterial stenosis. The most common indications for stenting were increasing creatinine level and abnormal Doppler velocities. There were more re-interventions with BMS (n = 4/11) than DES (n = 0/7), but the trend was not statistically significant (P = .12). Three patients who received BMS had a clinically significant decrease in blood pressure versus 4 in the DES group (P = .33). Six patients who received BMS had a clinically significant decrease in creatinine level versus 3 in the DES group (P = 1.0). CONCLUSION There is an absolute but not statistically significant difference in the incidence of restenosis requiring repeat intervention between the BMS and DES groups. No difference was detected in clinical success as measured by decreases in blood pressure or creatinine. Future larger studies are needed to corroborate these findings.
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Affiliation(s)
- R F Hanna
- Department of Radiology, Columbia University Medical Center, New York, New York
| | - F Hao
- Department of Radiology, Columbia University Medical Center, New York, New York.
| | - C F Kraus
- Department of Radiology, Columbia University Medical Center, New York, New York
| | - G Mitsopoulos
- Department of Radiology, Columbia University Medical Center, New York, New York
| | - G E Goldstein
- Department of Radiology, Columbia University Medical Center, New York, New York
| | - J Weintraub
- Department of Radiology, Columbia University Medical Center, New York, New York
| | - D Sperling
- Department of Radiology, Columbia University Medical Center, New York, New York
| | - J Susman
- Department of Radiology, Columbia University Medical Center, New York, New York
| | - P Schlossberg
- Department of Radiology, Columbia University Medical Center, New York, New York
| | - V Sheynzon
- Department of Radiology, Columbia University Medical Center, New York, New York
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Delucchi MA, Yang C, Burke AF, Ogden JM, Kurani K, Kessler J, Sperling D. An assessment of electric vehicles: technology, infrastructure requirements, greenhouse-gas emissions, petroleum use, material use, lifetime cost, consumer acceptance and policy initiatives. Philos Trans A Math Phys Eng Sci 2014; 372:20120325. [PMID: 24298079 DOI: 10.1098/rsta.2012.0325] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Concerns about climate change, urban air pollution and dependence on unstable and expensive supplies of foreign oil have led policy-makers and researchers to investigate alternatives to conventional petroleum-fuelled internal-combustion-engine vehicles in transportation. Because vehicles that get some or all of their power from an electric drivetrain can have low or even zero emissions of greenhouse gases (GHGs) and urban air pollutants, and can consume little or no petroleum, there is considerable interest in developing and evaluating advanced electric vehicles (EVs), including pure battery-electric vehicles, plug-in hybrid electric vehicles and hydrogen fuel-cell electric vehicles. To help researchers and policy-makers assess the potential of EVs to mitigate climate change and reduce petroleum use, this paper discusses the technology of EVs, the infrastructure needed for their development, impacts on emissions of GHGs, petroleum use, materials use, lifetime costs, consumer acceptance and policy considerations.
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Affiliation(s)
- M A Delucchi
- Institute of Transportation Studies, University of California, , Davis, 1605 Tilia Street, Davis, CA 95616, USA
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Fieg G, Rümmeli N, Sperling D, Johannink M. Experimentelle Untersuchungen der Extraktion von Resveratrol aus Wurzeln Polygonum Cuspidatum. CHEM-ING-TECH 2008. [DOI: 10.1002/cite.200750584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sher L, Sperling D, Zalsman G, Vardi G, Merrick J. Alcohol and suicidal behavior in adolescents. Minerva Pediatr 2006; 58:333-9. [PMID: 17008841] [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: 05/12/2023]
Abstract
This review describes epidemiology, pathophysiology, risk factors, treatment and prevention of suicidal behavior in adolescents. As one of the leading causes of death of young adults, adolescent suicide has become a public health problem and an increase in the adolescent suicide rate has been observed over the past several decades. One important risk factor thought to contribute to the recent rise in suicidal behavior among young adults is increasing alcohol abuse among adolescents. The link between alcohol and suicide in adolescents is complicated and multiple risk factors are important in explaining and understanding suicidal behavior among adolescents. Comorbid psychopathology, which is common among adolescent alcohol abusers, substantially increases the risk for suicide behavior. Availability of alcohol and guns at home may also contribute to suicide risk in adolescents. Studies of stress hormones, brain neurotransmitters, hereditary factors, behavioral measures and gender differences shed light in understanding this complex phenomenon. Ideally, treatment of adolescents who receive a diagnosis of an alcohol use disorder and co-occurring suicidality should follow an integrated protocol that addresses both conditions. Future studies of psychological and neurobiological mechanisms of suicidality in adolescents with alcohol and/or substance abuse are merited.
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Affiliation(s)
- L Sher
- Division of Neuroscience, Department of Psychiatry, Columbia University, NY, USA
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Birkedal C, Tapscott WJ, Giadrosich K, Spence RK, Sperling D. Minocycline-induced black thyroid gland: Medical curiosity or a marker for papillary cancer? ACTA ACUST UNITED AC 2001; 58:470-1. [PMID: 16093068 DOI: 10.1016/s0149-7944(01)00476-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PURPOSE Black pigmentation of the thyroid gland is a rare side effect of minocycline. METHODS Only 26 cases, in addition to the 2 we present, have been reported in the literature. Eleven cases of thyroid carcinoma associated with black thyroid syndrome have been reported. CONCLUSIONS The incidence of papillary cancer may be increased in thyroid glands stained by the minocycline pigment, which warrants an increased index of suspicion in patients who develop thyroid nodules and have previously been treated with minocycline.
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Affiliation(s)
- C Birkedal
- Department of Surgery, Baptist Health Systems, Birmingham, Alabama, USA
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Affiliation(s)
- D Sperling
- Institut für Mikrobiologie und Biotechnologie, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn D-53115, Germany
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Affiliation(s)
- J Bonn
- Department of Radiology, Jefferson Medical College and Thomas Jefferson University Hospital, Philadelphia, PA 19107, USA
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Abstract
The synthesis of paclitaxel esters of malic acid is described. These compounds were found to have improved water solubility and are stable in solution at neutral pH. The C2' modified compounds behave as prodrugs, that is, paclitaxel is generated upon exposure to human plasma, whereas the C7 modified derivatives do not. 2'-Malyl paclitaxel sodium salt demonstrated enhanced antitumour activity and less toxicity in a P388 murine leukaemia in vivo model when compared to paclitaxel.
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Affiliation(s)
- E W Damen
- Department of Organic Chemistry, NSR Center for Molecular Structure, Design and Synthesis, University of Nijmegen, Toernooiveld, The Netherlands
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Abstract
Tuberous sclerosis (TSC) is a dominantly inherited disorder due to mutations at two gene loci, the TSC1 locus on chromosome 9q34 and the TSC2 locus on chromosome 16p13.3. The TSC2 and the TSC1 genes have now been cloned, enabling mutation analysis. We report results of mutation analysis in a sporadic case of TSC first identified in intra-uterine life on the basis of the presence of cardiac rhabdomyomas. Postnatally this infant was also found to have subependymal nodules on brain computed tomographic scan. Hypomelanotic macules were not detected neonatally or at 12 months of age. The specific TSC1 exon 15 mutation found in our patient has not previously been reported in cases of TSC. This mutation involves duplication of a 23-bp segment of DNA between two 9-bp repeated sequence elements within exon 15. These repeat elements are located between nucleotides 1892-1900 and between nucleotides 1915-1923 within the TSC1 gene sequence. It is likely that the presence of these two repeated elements predisposes to misalignment of DNA strands and unequal crossing over. The mechanism of origin of rhabdomyomas in TSC is reviewed. Loss of heterozygosity in the TSC gene regions has been reported in cardiac rhabdomyomas; however, these lesions are self-limiting in their growth. The basis for this self limiting proliferation is not clear. One interesting postulation is that cardiac rhabdomyomas may be due to delay or failure of apoptosis which occurs as part of the normal remodeling process in the heart.
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Affiliation(s)
- M Smith
- Department of Pediatrics, University of California, Irvine 92697-4475, USA
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Skatchkov MP, Sperling D, Hink U, Mülsch A, Harrison DG, Sindermann I, Meinertz T, Münzel T. Validation of lucigenin as a chemiluminescent probe to monitor vascular superoxide as well as basal vascular nitric oxide production. Biochem Biophys Res Commun 1999; 254:319-24. [PMID: 9918836 DOI: 10.1006/bbrc.1998.9942] [Citation(s) in RCA: 148] [Impact Index Per Article: 5.9] [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: 11/22/2022]
Abstract
Lucigenin has been widely used as a chemiluminescent substrate to monitor vascular superoxide (O*-2) formation. The validity of lucigenin for detection of O*-2 has been questioned because O*-2 is generated by lucigenin itself. It has been shown that the concentration of lucigenin is a critical parameter affecting the validity of this assay. In the present studies we evaluated a reduced concentration of lucigenin (5 microM) as a tool to quantify O*-2 production in vascular tissue. Lucigenin-induced effects on endothelial function were assessed by isometric tension recording of isolated aortic rings suspended in organ baths. The effects of lucigenin on O*-2 production were studied using spin trapping and electron spin resonance spectroscopy. Lucigenin at 250 microM but not at 5 microM caused a significant attenuation of endothelium-dependent relaxations to acetylcholine, which was prevented by pretreatment with superoxide dismutase. Spin-trapping studies revealed that lucigenin at 250 microM increased vascular O*-2 production several fold while 5 microM lucigenin did not stimulate O*-2 production. Inhibition of NO synthase by NG-momomethyl-l-arginine as well as the removal of the endothelium almost doubled lucigenin-derived chemiluminescence (LDCL), indicating that basal production of endothelium-derived NO depresses the baseline chemiluminescence signal. Thus, lucigenin at a concentration of 5 microM seems to be a sensitive and valid probe for assessing O*-2 in vascular tissue. It can also be used as an indirect probe to estimate basal vascular NO release.
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Affiliation(s)
- M P Skatchkov
- Division of Cardiology, Department of Internal Medicine, University Hospital Eppendorf, Hamburg, Germany
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Skatchkov MP, Sperling D, Hink U, Anggard E, Münzel T. Quantification of superoxide radical formation in intact vascular tissue using a Cypridina luciferin analog as an alternative to lucigenin. Biochem Biophys Res Commun 1998; 248:382-6. [PMID: 9675145 DOI: 10.1006/bbrc.1998.8963] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [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: 11/22/2022]
Abstract
Lucigenin has been frequently used for the chemiluminescent detection of superoxide (*O-2) in intact tissue. More recent studies, however, revealed that lucigenin per se causes formation of *O-2 raising doubt about this probe to detect reliably *O-2. We therefore tested a more recently described chemiluminescence probe (2-methyl-6-phenyl-3,7-dihydroimidazol[1,2-alpha]pyrazine-3-one (CLA)) to estimate the ability of vascular tissue to generate *O-2 as an alternative to lucigenin. In a cell free system as well as in vascular tissue, CLA-enhanced chemiluminescence was dose dependently inhibited by superoxide dismutase (SOD), vitamin C and sodium nitroprusside (SNP). Electron spin resonance studies revealed that lucigenin (250 microM) but not CLA (1 microM) caused extra *O-2 production in vascular tissue. Stimulation of vessels with NADH (200 microM) increased CLA enhanced chemiluminescence, which was inhibited by low concentrations of superoxide dismutase (20U/ml). Endothelial removal as well as the nitric oxidase-synthase inhibitor increased CLA chemiluminescence in vessels. We conclude that CLA is a sensitive and specific chemiluminescence probe to detect *O-2 production in intact vascular tissue.
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Affiliation(s)
- M P Skatchkov
- Division of Cardiology, University Hospital Eppendorf, Hamburg, 20246, Germany
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Sperling D, Kappler U, Wynen A, Dahl C, Trüper HG. Dissimilatory ATP sulfurylase from the hyperthermophilic sulfate reducer Archaeoglobus fulgidus belongs to the group of homo-oligomeric ATP sulfurylases. FEMS Microbiol Lett 1998; 162:257-64. [PMID: 9627961 DOI: 10.1111/j.1574-6968.1998.tb13007.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [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: 11/27/2022] Open
Abstract
In the hyperthermophilic sulfate reducer Archaeoglobus fulgidus DSM 4304T, two open reading frames (sat and ORF2) are located upstream of the aprBA genes encoding adenosine-5'-phosphosulfate (APS) reductase. sat-ORF2-aprBA probably form a transcriptional unit, since sat is preceded by putative promoter sequences and termination signals are found downstream of aprA. While the 117-residue ORF2 product does not show significant similarity to known proteins, the 456-residue, 52.78-kDa, sat-encoded polypeptide exhibits similarity to the homo-oligomeric adenosine triphosphate (ATP) sulfurylases from sulfur-oxidizing bacteria and from sulfate-assimilating bacteria and eukaryotes. Functional overexpression of sat in Escherichia coli proved that the encoded protein acts as an ATP sulfurylase. The recombinant protein was purified to homogeneity and found to be a homo-dimer. Comparison of sulfate and thiosulfate grown A. fulgidus revealed that ATP sulfurylase and APS reductase are constitutive enzymes. Distance matrix analyses allowed insights into the evolution of prokaryotic ATP sulfurylases.
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Affiliation(s)
- D Sperling
- Institut für Mikrobiologie und Biotechnologie, Rheinische Friedrich-Wilhelms-Universität Bonn, Germany
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Abstract
A 4.5-month-old infant with transposition of great vessels and large ventricular septal defect developed acute infective endocarditis following cardiac catheterization. Beta-hemolytic streptococcus was recovered from three blood cultures. The infant survived after 6 weeks intravenous antibiotic therapy. The occurrence of infective endocarditis following cardiac catheterization during infancy is briefly reviewed and discussed. The importance of distinguishing febrile episodes of infancy from infective endocarditis and the use of two-dimensional echocardiography for diagnosis is re-emphasized.
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Berns MW, Wile A, Dahlman A, Johnson F, Burns R, Sperling D, Guiltinan M, Siemens A, Walter R, Hammer-Wilson M. Cellular uptake, excretion and localization of hematoporphyrin derivative (HPD). Adv Exp Med Biol 1983; 160:139-50. [PMID: 6220570 DOI: 10.1007/978-1-4684-4406-3_14] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Berns MW, Dahlman A, Johnson FM, Burns R, Sperling D, Guiltinan M, Siemens A, Walter R, Wright W, Hammer-Wilson M, Wile A. In vitro cellular effects of hematoporphyrin derivative. Cancer Res 1982; 42:2325-9. [PMID: 6210430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Several in vitro cell systems were exposed to hematoporphyrin derivative (HPD): established lines of rat kangaroo epithelial kidney; normal mouse embryonic fibroblasts; and differentiated neonatal rat myocardial cells. The uptake of HPD (25 to 100 micrograms/ml) by individual cells occurred rapidly over a 2-hr period and leveled off by 24 hr. HPD was excreted from cells by 48 hr after exposure. However, a low level of HPD (above background) was maintained in cells for up to 4 days following cessation of exposure. Intracellular binding of HPD was to mitochondria as demonstrated by fluorescence microscopy. HPD was also shown to have a growth-inhibiting effect on rat kangaroo cells without added light. The growth effects on mouse cells were less marked.
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Sperling D. Hospital controls save $3.1 billion. Bus Insur 1980; 14:1, 40. [PMID: 10273225] [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: 02/12/2023]
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Sperling D. Seamen health guides may cut costs. Bus Insur 1980; 14:2, 10. [PMID: 10247446] [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: 02/12/2023]
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