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Maguire SM, DeAngelis R, Dijkstra PD, Jordan A, Hofmann HA. Social network dynamics predict hormone levels and behavior in a highly social cichlid fish. Horm Behav 2021; 132:104994. [PMID: 33991797 DOI: 10.1016/j.yhbeh.2021.104994] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 03/11/2021] [Accepted: 05/04/2021] [Indexed: 11/27/2022]
Abstract
Group living confers many benefits while simultaneously exposing group members to intense competition. An individual's rise to prominence within a group may conflict with the overall functioning of the group. There is therefore a complex and dynamic relationship between the behavioral displays that directly benefit an individual, the consequences of these actions for the community, and how they feed back on individual-level fitness. We used a network analysis approach to study the link between behavior, social stability, and steroid hormone levels in replicate communities of the cichlid fish, Astatotilapia burtoni, which live in social groups with a dominance hierarchy. We demonstrate that individual behavior can have direct and indirect effects on the behavior of others while also affecting group characteristics. Our results show that A. burtoni males form stable social networks, where dominant individuals act as hubs for social interactions. However, there was variation in the temporal stability in these networks, and this variation in stability impacted hormone levels. Dominant males had higher testosterone levels, however, the differences in testosterone levels between dominant and subordinate males were greatest in stable communities. In sum, our analyses provide novel insights into the processes by which individual and community properties interact.
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Affiliation(s)
- Sean M Maguire
- Department of Integrative Biology, The University of Texas at Austin, Austin, TX, USA
| | - Ross DeAngelis
- Department of Integrative Biology, The University of Texas at Austin, Austin, TX, USA
| | - Peter D Dijkstra
- Department of Integrative Biology, The University of Texas at Austin, Austin, TX, USA
| | - Alex Jordan
- Department of Integrative Biology, The University of Texas at Austin, Austin, TX, USA
| | - Hans A Hofmann
- Department of Integrative Biology, The University of Texas at Austin, Austin, TX, USA; Institue for Cellular & Molecular Biology, Institute for Neuroscience, The University of Texas at Austin, Austin, TX, USA.
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2
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Abstract
Parental care represents a suite of distinct behaviors performed by parents to maximize fitness. Dynamic shifts in parental care behaviors, such as between nest defense and direct provisioning of the offspring, are required in response to environmental variation. However, the neural mechanisms which mediate such behavioral shifts remain a mystery. The anemonefish, Amphiprion ocellaris, represents an experimentally valuable model in social neuroscience which is conducive to manipulating the environment while simultaneously measuring parental care. The goal of this study was to determine the extent to which arginine vasotocin (AVT) and isotocin (IT) signaling are necessary for males to shift between direct egg care and aggressive nest defense in the presence of intruders, Domino damselfish (Dascyllus trimaculatus). The IT receptor antagonist desGly-NH2-d(CH2)5[D-Tyr2,Thr4]OVT, significantly reduced direct egg care, while at the same time increased levels of aggressive nest defense relative to vehicle. Conversely, blockade of AVT using the antagonist d(CH2)5[Tyr(Me)2]AVP, reduced aggression and tended to increase egg care. Results demonstrate that male anemonefish alter their parental strategy in response to allospecific intruders, and that IT and AVT signaling oppositely regulate parental care displays of aggression versus egg care.
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Affiliation(s)
- Ross DeAngelis
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, United States of America; Program for Ecology, Evolution and Conservation Biology, University of Illinois at Urbana-Champaign, United States of America.
| | - Logan Dodd
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, United States of America
| | - Justin Rhodes
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, United States of America; Program for Ecology, Evolution and Conservation Biology, University of Illinois at Urbana-Champaign, United States of America
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Dodd LD, Nowak E, Lange D, Parker CG, DeAngelis R, Gonzalez JA, Rhodes JS. Active feminization of the preoptic area occurs independently of the gonads in Amphiprion ocellaris. Horm Behav 2019; 112:65-76. [PMID: 30959023 DOI: 10.1016/j.yhbeh.2019.04.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 04/03/2019] [Accepted: 04/04/2019] [Indexed: 12/20/2022]
Abstract
Sex differences in the anatomy and physiology of the vertebrate preoptic area (POA) arise during development, and influence sex-specific reproductive functions later in life. Relative to masculinization, mechanisms for feminization of the POA are not well understood. The purpose of this study was to induce sex change from male to female in the anemonefish Amphiprion ocellaris, and track the timing of changes in POA cytoarchitecture, composition of the gonads and circulating sex steroid levels. Reproductive males were paired together and then sampled after 3 weeks, 6 months, 1 year and 3 years. Results show that as males change sex into females, number of medium cells in the anterior POA (parvocellular region) approximately double to female levels over the course of several months to 1 year. Feminization of gonads, and plasma sex steroids occur independently, on a variable timescale, up to years after POA sex change has completed. Findings suggest the process of POA feminization is orchestrated by factors originating from within the brain as opposed to being cued from the gonads, consistent with the dominant hypothesis in mammals. Anemonefish provide an opportunity to explore active mechanisms responsible for female brain development in an individual with male gonads and circulating sex steroid levels.
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Affiliation(s)
- Logan D Dodd
- Department of Psychology, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
| | - Ewelina Nowak
- Department of Psychology, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
| | - Dominica Lange
- Department of Psychology, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
| | - Coltan G Parker
- Department of Psychology, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
| | - Ross DeAngelis
- Department of Psychology, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
| | - Jose A Gonzalez
- Department of Psychology, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
| | - Justin S Rhodes
- Department of Psychology, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA.
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4
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DeAngelis R, Dodd L, Snyder A, Rhodes JS. Dynamic regulation of brain aromatase and isotocin receptor gene expression depends on parenting status. Horm Behav 2018; 103:62-70. [PMID: 29928890 DOI: 10.1016/j.yhbeh.2018.06.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 06/11/2018] [Accepted: 06/15/2018] [Indexed: 12/22/2022]
Abstract
Fathering behavior is critical for offspring survival in many species across diverse taxa, but our understanding of the neuroendocrine mechanisms regulating paternal care is limited in part because of the few primarily paternal species among the common animal models. However, many teleosts display primarily paternal care, and among the teleosts, anemonefish species are particularly well suited for isolating molecular mechanisms of fathering as they perform parental care in isolation of many other typically competing behaviors such as territorial defense and nest building. The goal of this study was to determine the extent to which whole brain gene expression levels of isotocin receptors, arginine vasotocin receptors, and aromatase as well as circulating levels of the bioactive sex steroid hormones estradiol (E2) and 11-ketotestosterone (11KT) vary in association with parenting behavior in Amphiprion ocellaris. Brain aromatase and IT receptor gene expression were higher in both males and females that were parenting versus not. IT receptor expression was overall higher in males than females, which we interpret is a reflection of the greater parental effort that males display. Aromatase was overall higher in females than males, which we conclude is related to the higher circulating E2, which crosses into the brain and increases aromatase transcription. Results suggest both aromatase and IT receptors are dynamically upregulated in the brains of A. ocellaris males and females to support high levels of parental effort.
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Affiliation(s)
- Ross DeAngelis
- Program for Ecology, Evolution and Conservation Biology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA.
| | - Logan Dodd
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
| | - Amanda Snyder
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
| | - Justin S Rhodes
- Program for Ecology, Evolution and Conservation Biology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
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5
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DeAngelis R, Gogola J, Dodd L, Rhodes JS. Opposite effects of nonapeptide antagonists on paternal behavior in the teleost fish Amphiprion ocellaris. Horm Behav 2017; 90:113-119. [PMID: 28288796 DOI: 10.1016/j.yhbeh.2017.02.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 02/15/2017] [Accepted: 02/23/2017] [Indexed: 01/18/2023]
Abstract
The nonapeptides isotocin (IT) and arginine vasotocin (AVT), along with their mammalian homologs oxytocin and arginine vasopressin, are well known regulators of social behaviors across vertebrate taxa. However, little is known about their involvement in paternal care. Here, we measured the effect of an IT and an AVT V1a receptor antagonist on paternal behaviors in the primarily paternal teleost Amphiprion ocellaris. We also measured the effect of the IT receptor antagonist on aggression in dyadic contests between two non-reproductive fish to assess specificity of the effect on paternal behaviors. Individual differences in levels of paternal behaviors (nips, fanning the eggs, and proportion of the time in the nest) were consistent across spawning cycles when no treatments were administered. The IT receptor antagonist severely reduced paternal behaviors but had no effect on aggression, whereas the AVT V1a receptor antagonist increased paternal behaviors. These results support the idea that IT signaling is crucial for the expression of paternal behavior in A. ocellaris. Based on a previous study showing that the AVT V1a antagonist decreases aggression in dyadic contests, we hypothesize that the antagonist enhances paternal behavior indirectly by reducing vigilance and aggression, thereby alleviating effort directed towards other competing behaviors and allowing for the increased expression of paternal behaviors.
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Affiliation(s)
- Ross DeAngelis
- Program for Ecology, Evolution and Conservation Biology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA.
| | - Joseph Gogola
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
| | - Logan Dodd
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
| | - Justin S Rhodes
- Program for Ecology, Evolution and Conservation Biology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana, Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
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6
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Schmidt C, Lin Z, Risitano A, DeAngelis R, Simmet T, Ricklin D, Lambris J. Optimisation and evaluation of the next generation of triple-targeted immune inhibitors from the “mini-FH class” of engineered complement inhibitors. Mol Immunol 2013. [DOI: 10.1016/j.molimm.2013.05.071] [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: 10/26/2022]
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7
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Ricklin D, Reis E, Ricci P, Huang Y, Lin Z, Chen H, Resuello R, DeAngelis R, Risitano A, Lambris J. Preclinical development and evaluation of compstatin analogs as an efficient and cost-effective treatment option for paroxysmal nocturnal hemoglobinuria. Mol Immunol 2013. [DOI: 10.1016/j.molimm.2013.05.074] [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: 11/27/2022]
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8
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Hajishengallis G, Maekawa T, Abe T, Hajishengallis E, Reis E, DeAngelis R, Lambris J. Complement involvement in periodontitis: Mechanisms and therapeutic intervention. Mol Immunol 2013. [DOI: 10.1016/j.molimm.2013.05.075] [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: 10/26/2022]
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9
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Hawkes NC, Stratton BC, Tala T, Challis CD, Conway G, DeAngelis R, Giroud C, Hobirk J, Joffrin E, Lomas P, Lotte P, Mailloux J, Mazon D, Rachlew E, Reyes-Cortes S, Solano E, Zastrow KD. Observation of zero current density in the core of jet discharges with lower hybrid heating and current drive. Phys Rev Lett 2001; 87:115001. [PMID: 11531529 DOI: 10.1103/physrevlett.87.115001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2001] [Indexed: 05/23/2023]
Abstract
Simultaneous current ramping and application of lower hybrid heating and current drive (LHCD) have produced a region with zero current density within measurement errors in the core ( r/a< or =0.2) of JET tokamak optimized shear discharges. The reduction of core current density is consistent with a simple physical explanation and numerical simulations of radial current diffusion including the effects of LHCD. However, the core current density is clamped at zero, indicating the existence of a physical mechanism which prevents it from becoming negative.
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Affiliation(s)
- N C Hawkes
- Euratom/UKAEA Fusion Association, Culham Science Centre, Abingdon, Oxfordshire, OX14 3DB, United Kingdom
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10
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Kovalovich K, Li W, DeAngelis R, Greenbaum LE, Ciliberto G, Taub R. Interleukin-6 protects against Fas-mediated death by establishing a critical level of anti-apoptotic hepatic proteins FLIP, Bcl-2, and Bcl-xL. J Biol Chem 2001; 276:26605-13. [PMID: 11349125 DOI: 10.1074/jbc.m100740200] [Citation(s) in RCA: 225] [Impact Index Per Article: 9.8] [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: 12/21/2022] Open
Abstract
Previous studies showed that following acute carbon tetrachloride (CCl(4)) treatment, interleukin-6 null (IL-6-/-) mice develop increased hepatocellular injury, defective regeneration, delayed wound healing, and increased hepatocyte apoptosis. Pretreatment with IL-6 prior to CCl(4) reduces injury, hepatocyte apoptosis, and accelerates regeneration in both IL-6-/- and +/+ livers. To demonstrate whether IL-6 can prevent liver injury that involves direct stimulation of hepatocyte apoptosis, IL-6-/- and +/+ mice were treated with the Fas agonist, Jo-2 mAb. At low Fas agonist doses, IL-6+/+ mice developed mild hepatic injury and survived, whereas IL-6-/- mice developed severe apoptotic hepatitis within 12 h and died. Pretreatment with IL-6 improved survival in IL-6-/- mice and reduced injury in both IL-6-/- and +/+ livers. The direct anti-apoptotic effects of IL-6 were demonstrated in vitro as IL-6 decreased Fas-mediated apoptosis in both IL-6-/- and +/+ primary hepatocyte cultures, and suggested that IL-6-/- hepatocytes have a pre-existing defect in anti-apoptotic pathways. After Fas activation, IL-6-/- livers demonstrated evidence of both proximal and distal alterations in the apoptotic pathways including elevated caspase 8 and 3 activation-associated fragments, and loss of cytochrome c staining. IL-6-/- livers had reduced pre-existing protein expression of the anti-apoptotic factors Bcl-2 and Bcl-xL as well as more rapid degradation of FLIP following Fas treatment that appeared to be post-transcriptionally regulated. FLIP is a crucial proximal inhibitor of caspase 8 activation in Fas, tumor necrosis factor, and DR3/DR4-mediated apoptosis, and Bcl-2 and Bcl-xL more downstream anti-apoptotic regulators. IL-6 may function as a critical anti-apoptotic factor in the liver by its ability to establish and maintain an adequate level of FLIP and downstream anti-apoptotic factors.
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Affiliation(s)
- K Kovalovich
- Department of Genetics, University of Pennsylvania Medical School, Philadelphia, Pennsylvania 19104, USA
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11
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Stone KL, DeAngelis R, LoPresti M, Jones J, Papov VV, Williams KR. Use of liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) for routine identification of enzymatically digested proteins separated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Electrophoresis 1998; 19:1046-52. [PMID: 9638951 DOI: 10.1002/elps.1150190620] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [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: 11/12/2022]
Abstract
Automated liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) analysis of >100 tryptic digests carried out on sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) separated, Coomassie Blue-stained proteins that were prepared by >50 different laboratories demonstrates that a commercial electrospray/quadrupole ion trap mass spectrometer and the tandem mass correlation algorithm developed by Eng et al. (Am. Soc. Mass Spectrom. 1994, 5, 976-989) provide an extremely robust and facile approach to routine protein identification. By requiring a minimum of two significant matches to peptides that would be predicted to be produced by the protease that was used, low pmol levels of proteins can be identified with high confidence while minimizing the probability of identifying the protease itself and/or the ubiquitous contaminant, keratin. Hence, in only 7% of the digests analyzed was keratin identified and in only 5% of the digests analyzed was the protease itself identified. In contrast, 58% of the analyzed samples were identified and, in many instances, multiple proteins were identified in the same sample. Although the median amount of digest analyzed was 6.1 pmol, the limit of sensitivity (as the instrument is configured with a flow rate of 4 microL/min) appears to be at the 500 fmol level. Since one of the primary reasons for not identifying a sample is that its sequence is not yet in the database searched, the utility of an LC MS/MS approach to protein identification will certainly increase in the future as the sequences of more genomes are completed.
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Affiliation(s)
- K L Stone
- HHMI Biopolymer Laboratory and W. M. Keck Foundation, Yale University, New Haven, CT 06519, USA.
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12
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Gaissert HA, Mathisen DJ, Grillo HC, Malt RA, Wain JC, Moncure AC, Kim JH, Mueller PR, DeAngelis R, Ottinger LW. Short-segment intestinal interposition of the distal esophagus. J Thorac Cardiovasc Surg 1993; 106:860-6; discussion 866-7. [PMID: 8231208] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Esophageal replacement remains a challenge. Colon and jejunum provide alternative conduits to replace the lower esophagus when stomach is not suitable. Between 1971 and 1991, 41 patients underwent short-segment interposition of the esophagus with jejunum or colon. Indications were failed antireflux procedures (n = 21), nondilatable stricture (n = 9), achalasia (n = 2), moniliasis (n = 2), Barrett's esophagus with carcinoma in situ (n = 2), hemorrhagic esophagitis after esophagogastrectomy (n = 1), motility disorder (n = 1), instrumental perforation (n = 1), carcinoma (n = 1), and leiomyosarcoma (n = 1). Thirty-one patients (75.6%) had prior surgical procedures. Interposition with colon was performed in 22 patients and with jejunum in 19. Major complications occurred in 45% after colon interposition (10/22) and hospital mortality was 4.5% (1/22). Major complications after jejunal interposition occurred in 31% (6/19) and hospital mortality was 10.5% (2/19). A contained anastomotic leak occurred in 1 patient, perforation of a colon segment in 1, and jejunal graft necrosis in a third. Late functional results in 34 patients with a mean follow-up of 87 months were excellent or good in 26, fair in 5, and poor in 1. Colon interposition failed to improve symptoms in 2 patients with gastrointestinal motility disorders. Six patients underwent manometry and barium food provocation study. Two colon segments and 3 jejunal interpositions were hypoperistaltic or aperistaltic according to manometry. There was 1 case of aperistaltic jejunum with a distended afferent loop. When stomach is not available, successful palliation of swallowing can be accomplished with either jejunum or colon. Surgeons involved in the management of esophageal disease should be familiar with the technical details of both procedures.
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Affiliation(s)
- H A Gaissert
- Surgical Service, Massachusetts General Hospital, Boston 02114
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Abstract
The ability of a siderophore-catabolizing bacterium to assimilate ferric ion was examined. While the bacterium utilizes the siderophore deferrioxamine B (DFB) as a carbon source, it was incapable of using the ferric ion analogue (ferrioxamine B) as an iron source. It did, however, assimilate the ferric ion of the chelator ferric nitrilotriacetic acid and of the siderophore ferrirhodotorulic acid (ferriRA). Neither ferriRA nor its deferrated analog (RA), however, were capable of functioning as carbon sources for the bacterium. The microbe thus employs a 'nutritional selectivity' with respect to these two siderophores. That is, it does not use the siderophore it employs as a carbon source (DFB) as an iron source nor does the siderophore utilized as an iron source, i.e. ferriRA, nor its deferrated analog (RA), serve as carbon sources for the organism.
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Affiliation(s)
- R DeAngelis
- Department of Biology, Loyola University of Chicago, IL 60626
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14
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DeAngelis R, Lessig ML. ECG case studies. Hyperkalemia. Crit Care Nurse 1992; 12:55-9. [PMID: 1559383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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15
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DeAngelis R, Lessig ML. ECG case studies. Hyperkalemia. Crit Care Nurse 1992. [DOI: 10.4037/ccn1992.12.3.55] [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: 11/01/2022]
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16
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Lessig ML, DeAngelis R. Torsade de Pointes--a cardiac ballet. Crit Care Nurse 1991; 11:63-7. [PMID: 1954750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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DeAngelis R, Lessig ML. Hypokalemia. Crit Care Nurse 1991; 11:71-2, 74-5. [PMID: 2070637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Hypokalemia is an electrolyte imbalance that can have serious effects on the patient if not detected early. Therefore, it is important for the nurse to: (1) be aware of those patients at risk for excess potassium loss, (2) monitor those patients' ECG to observe for any changes indicative of hypokalemia, and (3) assess for physical signs and symptoms indicative of hypokalemia. Early detection of hypokalemia and early intervention will prevent potential catastrophic events.
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DeAngelis R, Lessig ML. Hypokalemia. Crit Care Nurse 1991. [DOI: 10.4037/ccn1991.11.7.71] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Hypokalemia is an electrolyte imbalance that can have serious effects on the patient if not detected early. Therefore, it is important for the nurse to: (1) be aware of those patients at risk for excess potassium loss, (2) monitor those patients' ECG to observe for any changes indicative of hypokalemia, and (3) assess for physical signs and symptoms indicative of hypokalemia. Early detection of hypokalemia and early intervention will prevent potential catastrophic events.
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DeAngelis R, Loebs P, Maehr R, Savarese J, Welch R. High-performance liquid chromatographic analysis of doxacurium, a new long-acting neuromuscular blocker. J Chromatogr 1990; 525:389-400. [PMID: 2139440 DOI: 10.1016/s0378-4347(00)83415-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A rapid and sensitive high-performance liquid chromatographic procedure was developed for the analysis of the new, long-acting neuromuscular blocker doxacurium in the plasma and urine of dog and man and in the bile of dog. Samples were prepared on solid-phase extraction cartridges containing a methyl (C1) bonded phase and were chromatographed on a 15 cm reversed-phase column (C1) using a mobile phase of 0.05 M monobasic potassium phosphate-acetonitrile (30:70, v/v). The compound was detected at 210 nm with a lower limit of quantitation of 10 ng/ml. An inter-assay accuracy of 90-92% was obtained for the analysis of the drug from biological fluids. The method was applied to studies of doxacurium after intravenous administration to dog and man.
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Affiliation(s)
- R DeAngelis
- Department of Medicinal Biochemistry, Burroughs Wellcome Co., Durham, NC 27713
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21
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DeAngelis R. A dysrhythmia learning program. Crit Care Nurse 1988; 8:77-8. [PMID: 3077618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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22
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DeAngelis R. A dysrhythmia learning program. Crit Care Nurse 1988. [DOI: 10.4037/ccn1988.8.7.77] [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: 11/01/2022]
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DeAngelis R, Lessig ML. Physical augmentation of cardiac output. Crit Care Nurs Q 1988; 10:35-42. [PMID: 3390742 DOI: 10.1097/00002727-198803000-00006] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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24
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Basta SJ, Debros F, Savarese JJ, Ali HH, Embree P, Lai A, Schwartz A, DeAngelis R, Gallagher M, James N. BW A938U PHARMACOKINETICS AND DYNAMICS IN HEALTHY SURGICAL PATIENTS UNDER ISOFLURANE ANESTHESIA. Anesth Analg 1988. [DOI: 10.1213/00000539-198802001-00009] [Citation(s) in RCA: 2] [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: 11/05/2022]
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25
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DeAngelis R. Amiodarone. Crit Care Nurse 1986; 6:12-3, 16. [PMID: 3641704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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26
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27
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DeAngelis R, Brott WH. Converting micrograms/kilograms/minute to microdrops. 3. The "factor of 15" method. Dimens Crit Care Nurs 1982; 1:334-7. [PMID: 6923813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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