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Mullineaux PM, Karpinski S, Jiménez A, Cleary SP, Robinson C, Creissen GP. Identification of cDNAS encoding plastid-targeted glutathione peroxidase. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 1998; 13:375-9. [PMID: 9680987 DOI: 10.1046/j.1365-313x.1998.00052.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A cDNA was isolated from pea leaf RNA which encodes a phospholipid hydroperoxide glutathione peroxidase (PHGPX; E.C. 1.1.1.1.9). The N-terminal section of this PHGPX encodes a recognisable chloroplast transit peptide. Efficient import in vitro of the pre-PHGPX protein into the stroma of isolated pea chloroplasts confirmed that the PHGPX is a chloroplast-located enzyme. The pea PHGPX has highly conserved homologues in Arabidopsis, citrus and Nicotiana sylvestris and the authors suggest that these proteins are also localised in the chloroplast and not in the cytosol as previously supposed.
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377
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Tare M, Prestwich SA, Gordienko DV, Parveen S, Carver JE, Robinson C, Bolton TB. Inwardly rectifying whole cell potassium current in human blood eosinophils. J Physiol 1998; 506 ( Pt 2):303-18. [PMID: 9490857 PMCID: PMC2230727 DOI: 10.1111/j.1469-7793.1998.303bw.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
1. Membrane currents were studied in single human blood eosinophils using the whole cell voltage clamp technique. The whole cell current-voltage relationship exhibited rectification about the membrane potential which followed the potassium equilibrium potential when [K+]o was raised. Elevation of [K+]o considerably potentiated inward current amplitude, and in some cells channel activity was discernible in the whole cell membrane current recordings. The single channel conductance was 24 +/- 1 pS ([K+]o, 100 mM; [K+]i, 140 mM), and eosinophils were found to have as few as three, and on average twenty, inward rectifier channels each. 2. The inward current was inhibited in a voltage-dependent manner by extracellular cations in order of potency Ba2+ > Cs+ > Na+. Intracellular acidification inhibited while alkalization augmented the inward current. Mg2+ contributed to rectification as dialysis with nominally Mg(2+)-free pipette solution was associated with an increase in the outward current during membrane polarization. 3. By reverse transcription-polymerase chain reaction (RT-PCR) using suitable primers on human eosinophils mRNA, an inward rectifier channel, Kir2.1, was identified, which is known from expression studies to have very similar properties to those found in this study. 4. Superoxide anion production or its stimulation by phorbol 12-myristate 13-acetate (PMA) was not significantly affected by depolarization with 140 mM [K+]o, or by 1 mM BaCl2. 5. It is concluded that the single channel currents and the whole cell current rectification observed in human blood eosinophils resulted from the presence of an inwardly rectifying potassium channel, probably Kir2.1.
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Abstract
The hydroxyapatite crystals of mature enamel are unusually large, uniform and regularly disposed within the tissue, implying that their development is a highly controlled process. The organic matrix of developing enamel is presumed to play an important role in the modulation of mineral deposition and growth during tooth morphogenesis but the precise functions of individual matrix proteins remain unclear. The aim of this review was to survey the current knowledge of enamel matrix proteins with a view to suggesting possible functions. The organic matrix is highly heterogeneous, comprising proteins derived from a number of different genes, including amelogenin, enamelin, ameloblastin (amelin/sheathlin), tuftelin, dentine sialophosphoprotein, enzymes and serum proteins such as albumin. Each of these classes appears to undergo post-secretory sequential degradation which contributes further towards matrix heterogeneity. Possible functions of these proteins include de novo mineral nucleation/initiation (dentine sialophosphoprotein, tuftelin), mineral ion binding as crystal precursors (amelogenin, enamelin), control of crystal growth (amelogenin, enamelin, ameloblastin), support of growing crystals (amelogenin, enamelin), determination of prismatic structure (ameloblastin), cell signalling (tuftelin, ameloblastin), control of secretion (breakdown products) and protection of the mineral phase (amelogenin, enamelin). Failure of these mechanisms could lead to incomplete maturation of the enamel and the eruption of dysplastic tissue.
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379
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Evans DG, Walsh S, Jeacock J, Robinson C, Hadfield L, Davies DR, Kingston R. Incidence of hereditary non-polyposis colorectal cancer in a population-based study of 1137 consecutive cases of colorectal cancer. Br J Surg 1997. [PMID: 9313714 DOI: 10.1002/bjs.1800840924] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Previous reports have indicated that 5-13 per cent of colorectal cancer is hereditary. However, the proportion of cases arising as a result of mutations in the hereditary non-polyposis colorectal cancer (HNPCC) genes remains to be determined. METHODS This study is a part prospective, part retrospective review of all cases of colorectal cancer from a district hospital over 14 years. Some 1137 consecutive patients with colorectal cancer were questioned about their family history of cancer and details were logged on a database. For the past 4 years each case has been re-evaluated where possible. RESULTS Some 118 patients indicated initially that they had a first-degree relative with colorectal cancer, but on re-evaluation there were significant discrepancies. Only three cases (0.3 per cent) occurred in families which strictly fulfilled the criteria for HNPCC and there were no cases of familial adenomatous polyposis. A total of 16 patients (1.4 per cent) fulfilled looser criteria for HNPCC. CONCLUSION This population-based study has shown a lower frequency of familial bowel cancer than previous studies and may reflect a lower incidence of inherited mutations in the HNPCC DNA mismatch repair genes than is currently accepted.
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380
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Robinson C. Modes of treatment. Aust Vet J 1997; 75:759-60. [PMID: 9406641 DOI: 10.1111/j.1751-0813.1997.tb12266.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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381
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Robinson C. Early intervention services. JOURNAL OF THE SOCIETY OF PEDIATRIC NURSES : JSPN 1997; 2:191-2. [PMID: 9444646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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382
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Huang S, Nakagaki H, Okumura H, Hayashizaki J, Negoro M, Adachi K, Tsuge S, Ando S, Robinson C, Pearce E, Huang A, Nguyen TT. Fluoride profiles in dental calculus from Japanese, Chinese and British residents. Arch Oral Biol 1997; 42:665-71. [PMID: 9447256 DOI: 10.1016/s0003-9969(97)00084-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Whether the fluoride concentrations and profiles differ in human dental calculus obtained from different countries was investigated. A total of 203 dental calculus deposits on 203 permanent teeth from residents (mean age, 52.1 years) of Nagoya (Japan), Shanghai (China), Leeds (Great Britain) and the Wuhan mountainous area (China, fluoridated area) were analysed. An abrasive microsampling procedure was used to examine fluoride distribution. There were five types of fluoride profiles in dental calculus in each area/country (designated types L, J, U, T, W). In supragingival calculus, type L (highest in the outermost layers) and type J (highest in the innermost layers) both had significantly higher values than type U (high in the surface and innermost layers) but were relatively identical. In subgingival calculus, type W (high in the outermost, mid and innermost layers) was characteristics. Calculus from the Wuhan mountainous area (fluoridated) had the highest fluoride concentration, followed by Leeds (non-fluoridated), and Nagoya and Shanghai (non-fluoridated) calculus had the lowest. Fluoride concentrations in supragingival calculus were higher in teeth extracted because of periodontal diseases than dental caries. It is concluded that fluoride concentrations and distribution in dental calculus differ from country to country, probably due to different fluoride environments.
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383
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Townsley R, Robinson C. Nutrition: comfort eating. NURSING TIMES 1997; 93:74. [PMID: 9326039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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384
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Robinson C. An Open Letter to UPS Members. New Solut 1997; 7:4-5. [PMID: 22910067 DOI: 10.2190/ns7.4.b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
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385
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Li HY, DeLucca I, Boswell GA, Billheimer JT, Drummond S, Gillies PJ, Robinson C. Design, synthesis and structure-activity relationship studies of novel 4,4-bis(trifluoromethyl)imidazolines as acyl-CoA: cholesterol acyltransferase (ACAT) inhibitors and antihypercholesterolemic agents. Bioorg Med Chem 1997; 5:1345-61. [PMID: 9377095 DOI: 10.1016/s0968-0896(97)00058-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Novel 4,4-bis(trifluoromethyl)imidazolines have been found to be the potent acyl-CoA cholesterol acyltransferase (ACAT) inhibitors. ACAT is responsible for cholesterol esterification in the intestine, liver, and the arterial wall. These novel imidazolines also inhibit cholesterol ester formation in the macrophage. Several compounds have shown potent serum cholesterol-lowering activity in several animal models. Para-substitution of the 2-phenyl is critical for in vitro and in vivo activity. The 4,4-bis(trifluoromethyl)imidazolines with a para-cyano group on 2-phenyl and a 4-alkylcyclohexyl amide as the side-chain at the 5-position possess the most potent inhibitory activity in this series. Based on biochemical studies, this series acts as a competitive inhibitor with respect to cholesterol binding at the enzyme, which distinguishes it from most of the ACAT inhibitors discovered to date. Preliminary biological studies supported by X-ray crystal structures, molecular modeling, and structure-activity relationship (SAR) studies suggest that this series may be a cholesterol mimic.
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386
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Kato S, Nakagaki H, Toyama Y, Kanayama T, Arai M, Togari A, Matsumoto S, Strong M, Robinson C. Fluoride profiles in the cementum and root dentine of human permanent anterior teeth extracted from adult residents in a naturally fluoridated and a non-fluoridated area. Gerodontology 1997; 14:1-8. [PMID: 9610297 DOI: 10.1111/j.1741-2358.1997.00001.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To determine the effect of water fluoride concentration on the fluoride profile across the entire thickness of the cementum and root dentine of human permanent anterior teeth in adults. SUBJECTS Twenty-eight human permanent anterior teeth from individuals aged from 30 to over 60 years were studied. SETTING Teeth were obtained from a natural high-fluoride area (West Hartle-pool, UK; 1.0-1.3 ppm F in drinking water, WHP) and the other from a non-fluoridated naturally low fluoride area (Leeds, UK; 0.1 ppm F in drinking water, LDS). DESIGN Cementum and root dentine were sampled using an abrasive micro-sampling technique from the cementum surface to the pulpal surface of root dentine. RESULTS Fluoride concentration was higher in tooth roots (the cementum and dentine) taken from the naturally fluoridated area (WHP) than from the non-fluoridated area (LDS). Age and average fluoride concentration showed a positive correlation in WHP dentine, middle region of the root (r = 0.78, P < 0.001) and in the apical region of the root (r = 0.61, P < 0.05). WHP cementum had the strongest fluoride concentration correlation with age in the cervical region of the root (r = 0.67, P < 0.01). An analysis of variance (ANOVA) showed that the area (water fluoride content), age and number of years lived in the area combined with total age were significant. CONCLUSIONS The fluoride content of cementum and root dentine in adult residents is related to fluoride content in drinking water.
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Kato K, Nakagaki H, Takami Y, Tsuge S, Ando S, Robinson C. A method for determining the distribution of fluoride, calcium and phosphorus in human dental plaque and the effect of a single in vivo fluoride rinse. Arch Oral Biol 1997; 42:521-5. [PMID: 9296272 DOI: 10.1016/s0003-9969(97)00046-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A new sampling method, capable of sampling plaque from its surface to its interior for quantitative studies, was modified to meet some of the requirements for the determination of the fluoride and mineral (Ca and P) profiles within dental plaque formed in vivo. Plaque samples were repeatedly collected from the same individual, using special devices, before a single fluoride rinse (900 parts/10(6) fluoride) and 10 min and 24 hr after rinse. The method allowed examination of fluoride, calcium and phosphorus distribution along the entire thickness of plaque. Fluoride content significantly increased throughout the sample 10 min after rinsing, indicating the fluoride had rapidly penetrated into the plaque. Although the elevated fluoride concentrations diminished almost to baseline with 24 hr, a high correlation was found between fluoride and minerals in each plaque fraction. It is concluded that this technique will be useful for evaluating the fluoride and mineral behaviour in the saliva/plaque and plaque/enamel interfaces, and the anti caries efficacy of fluoride applications.
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388
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Bogsch E, Brink S, Robinson C. Pathway specificity for a delta pH-dependent precursor thylakoid lumen protein is governed by a 'Sec-avoidance' motif in the transfer peptide and a 'Sec-incompatible' mature protein. EMBO J 1997; 16:3851-9. [PMID: 9233795 PMCID: PMC1170009 DOI: 10.1093/emboj/16.13.3851] [Citation(s) in RCA: 126] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Cleavable N-terminal targeting signals direct the translocation of lumenal proteins across the chloroplast thylakoid membrane by either a Sec-type or delta pH-driven protein translocase. The targeting signals specify choice of translocation pathway, yet all resemble typical bacterial 'signal' peptides in possessing a charged N-terminus (N-domain), hydrophobic core region (H-domain) and more polar C-terminal region (C-domain). We have previously shown that a twin-arginine motif in the N-domain is essential for targeting by the delta pH-dependent pathway, but it has remained unclear why targeting signals for this system (transfer peptides) are not recognized by the Sec apparatus. We show here that the conserved charge distribution around the H-domain in the 23K transfer peptide (twin-Arg in the N-domain, Lys in the C-domain) constitutes a 'Sec-avoidance' signal. The C-domain Lys, while not important for delta pH-dependent targeting, is the only barrier to Sec-dependent translocation; its removal generates an apparently perfect signal peptide. Conversely, insertion of twin-Arg into the N-domain of a Sec substrate has little effect, as has insertion of a C-domain Lys, but the combined substitutions almost totally block transport. We also show that the 23K mature protein is incapable of being targeted by the Sec pathway, and it is proposed that the role of the Sec-avoidance motif in the transfer peptide is to prevent futile interactions with the Sec apparatus.
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389
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Sundberg E, Slagter JG, Fridborg I, Cleary SP, Robinson C, Coupland G. ALBINO3, an Arabidopsis nuclear gene essential for chloroplast differentiation, encodes a chloroplast protein that shows homology to proteins present in bacterial membranes and yeast mitochondria. THE PLANT CELL 1997; 9:717-30. [PMID: 9165749 PMCID: PMC156951 DOI: 10.1105/tpc.9.5.717] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The albino3 (alb3) mutant of Arabidopsis forms white or light yellow cotyledons and leaves and when germinated on soil does not survive beyond the seedling stage. The chloroplasts of the mutant are abnormal, as determined by electron microscopy, and contain reduced levels of chlorophyll. However, the chloroplasts of alb3 mutants are sufficiently differentiated to enable the expression of two nuclear genes whose transcription requires the presence of chloroplasts. The ALB3 gene was isolated by transposon tagging with the Activator/Dissociation transposable element system. ALB3 is a novel plant gene whose product shows homology to a bacterial membrane protein previously identified in five bacterial species and to a yeast protein, OXA1, and its human homolog. OXA1 is required in the mitochondria for proper assembly of the cytochrome oxidase complex. ALB3 does not have a function identical to OXA1 because mitochondrial cytochrome oxidase activity is not affected in the mutant, and immunogold labeling as well as chloroplast import experiments performed in vitro demonstrated that the ALB3 protein is present in chloroplast membranes. ALB3 might have a function related to that of OXA1 and be involved in the assembly of a chloroplast enzyme complex.
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390
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Petri M, Robinson C. Oral contraceptives and systemic lupus erythematosus. ARTHRITIS AND RHEUMATISM 1997; 40:797-803. [PMID: 9153538 DOI: 10.1002/art.1780400504] [Citation(s) in RCA: 96] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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391
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Brink S, Bogsch EG, Mant A, Robinson C. Unusual characteristics of amino-terminal and hydrophobic domains in nuclear-encoded thylakoid signal peptides. EUROPEAN JOURNAL OF BIOCHEMISTRY 1997; 245:340-8. [PMID: 9151962 DOI: 10.1111/j.1432-1033.1997.00340.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Thylakoid transfer signals carry information specifying translocation by either a Sec- or delta pH-dependent protein translocator in the chloroplast thylakoid membrane, yet all resemble classical signal peptides in overall structural terms. Comparison of known transfer signals reveals two differences: (a) signals for the delta pH-driven system invariably contain a critical twin-arginine (Arg-Arg) motif prior to the hydrophobic (H) domain, whereas known Sec-dependent signals contain lysine, and (b) the H-domains of Sec-dependent signals are generally longer. Previous work has shown that a twin-Arg motif before the H-domain is critical for targeting by the delta pH-dependent pathway; in this report we show that the charge characteristics of this region are not important for sorting by the Sec pathway. Twin-Lys, twin-Arg or single Arg are all acceptable to the Sec system, although single Lys/Arg is preferred. The single Lys in pre-plastocyanin can even be replaced by an uncharged residue without apparent effect. We have also generated a pre-plastocyanin mutant containing an H-domain which, in terms of hydropathy profile, is identical to that of a delta pH-dependent protein. This mutant is also transported efficiently by the Sec system, demonstrating that hydrophobicity per se is not a key sorting determinant. However, the characteristics of the H-domain may be important in avoiding a different form of mis-targeting: to the endoplasmic reticulum. Thylakoid signal peptides have undergone substantial structural changes during the evolution of the chloroplast from endosymbiotic cyanobacterium: plastid-encoded and cyanobacterial signals contain H-domains that are highly hydrophobic and enriched in Leu and aromatic residues, whereas nuclear-encoded counterparts are Ala-rich and far less hydrophobic. We speculate that this trend may reflect a need to avoid mistargeting through recognition by cytosolic signal recognition particle, which preferentially interacts with more hydrophobic signal peptides.
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392
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Robinson C, Zhang L, Hsu CH. Effects of ricin on the ability of the rabbit aorta to relax to relaxant agents. Toxicon 1997. [DOI: 10.1016/s0041-0101(97)84743-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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393
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Walter JS, Griffith P, Sweeney J, Scarpine V, Bidnar M, McLane J, Robinson C. Multielectrode nerve cuff stimulation of the median nerve produces selective movements in a raccoon animal model. J Spinal Cord Med 1997; 20:233-43. [PMID: 9144615 DOI: 10.1080/10790268.1997.11719475] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
In this study, an electrode system consisting of twelve small platinum dot electrodes imbedded in a spiral silicone rubber insulating cuff was used to investigate the feasibility of selective (regional) stimulation of the median nerves of the raccoon. Acute experiments in four raccoons consisted of functional responses observations, isometric force recordings from tendon attachments and postmortem fascicular mapping. Functional responses (elbow, wrist and/or digit flexion, pronation and/or thumb abduction) to selective stimulation were noted as dependent upon cuff electrode configuration (longitudinal tripole with and without field steering, as well as a transverse bipolar arrangement) and current level (threshold, 1/2 maximal, maximal). Muscle force recruitment curves (force as a function of stimulus amplitude) were plotted for flexor digitorum superficialis, flexor digitorum profundus, flexor carpi radialis, palmaris longus and pronator teres of three raccoons. Fascicular maps at the level of the nerve cuff were created indicating the approximate position of innervation to each of the aforementioned muscles, as well as other innervation such as paw fascicles, sensory fascicles, and elbow innervation (such as coracobrachialis). The greatest selectivity was observed at or near threshold current levels. In all four raccoons studied, a threshold electrode choice and stimulation strategy could be identified enabling selective production of either digit flexion, wrist flexion and/or digit and wrist flexion. It was possible to elicit a selective pronation response at threshold in three of the four animals. Selective elbow flexion at threshold could be produced in all four experiments. With stronger currents, additional movements were usually induced. The raccoon therefore appears to be a suitable, if challenging, animal model for further development of not only nerve cuff electrode approaches but perhaps other stimulation electrode technologies prior to human neuroprosthetic studies.
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394
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Valdiserri RO, Robinson C, Lin LS, West GR, Holtgrave DR. Determining allocations for HIV-prevention interventions: assessing a change in federal funding policy. AIDS & PUBLIC POLICY JOURNAL 1997; 12:138-48. [PMID: 10915267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
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395
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Macones GA, Robinson C. Is there justification for using indomethacin in preterm labor? An analysis of neonatal risks and benefits. Am J Obstet Gynecol 1997. [DOI: 10.1016/s0002-9378(97)80197-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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396
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BishopLindsay KL, Brenneman S, Malone DJ, Von Nesson S, Robinson C, Jenkins V, McGuigan N, Gregory R. DEVELOPMENT OF A CRITICAL PATHWAY UTILIZING TRENDS IN CLINICAL OUTCOMES AT AN ADULT CYSTIC FIBROSIS CENTER. Cardiopulm Phys Ther J 1997. [DOI: 10.1097/01823246-199708040-00030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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397
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Rattray C, Robinson C, Hussey E, Macleod Y, Fagan T, Wynter HH. The Norplant experience at the University Hospital of the West Indies. J OBSTET GYNAECOL 1997; 17:569-72. [PMID: 15511961 DOI: 10.1080/01443619768632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Sixty-eight patients had Norplant inserted between May 1992 and November 1993 as part of a pre-introductory study. The main side effect was weight change which occurred in 85.3% (58 patients); weight loss occurred in 25.0% (17 patients, one patient voiced a complaint) and weight gain occurred in 60.3% (41 patients, 10 of whom voiced a complaint). Menstrual problems were the next most frequent side effect occurring in 70.4% (48 patients); spotting occurring in 22% (15 patients, none of whom complained) and heavy bleeding in 7.3% (five patients, all of whom complained). Amenorrhoea occurred in 41.1% (28 patients). Other complaints were minor. No pregnancies have been recorded to date. There were no procedural complications and all patients were satisfied with the cosmetic appearance. To date there have been 36 removals, the majority for menstrual complications. Norplant is a safe, effective means of 'reversible sterilisation' which should be utilised in family planning programmes throughout the country.
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398
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Robinson C, Kalsheker NA, Srinivasan N, King CM, Garrod DR, Thompson PJ, Stewart GA. On the potential significance of the enzymatic activity of mite allergens to immunogenicity. Clues to structure and function revealed by molecular characterization. Clin Exp Allergy 1997; 27:10-21. [PMID: 9117873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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399
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Robinson C, Kirkham J, Percival R, Shore RC, Bonass WA, Brookes SJ, Kusa L, Nakagaki H, Kato K, Nattress B. A method for the quantitative site-specific study of the biochemistry within dental plaque biofilms formed in vivo. Caries Res 1997; 31:194-200. [PMID: 9165190 DOI: 10.1159/000262398] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The study of plaque biofilms in the oral cavity is difficult as plaque removal inevitably disrupts biofilm integrity precluding kinetic studies involving the penetration of components and metabolism of substrates in situ. A method is described here in which plaque is formed in vivo under normal (or experimental) conditions using a collection device which can be removed from the mouth after a specified time without physical disturbance to the plaque biofilm, permitting site-specific analysis or exposure of the undisturbed plaque to experimental conditions in vitro. Microbiological analysis revealed plaque flora which was similar to that reported from many natural sources. Analytical data can be related to plaque volume rather than weight. Using this device, plaque fluoride concentrations have been shown to vary with plaque depth and in vitro short-term exposure to radiolabelled components may be carried out, permitting important conclusions to be drawn regarding the site-specific composition and dynamics of dental plaque.
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