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Bernard M, Menasche P, Canioni P, Grousset C, Fontanarava E, Geyer RP, Piwnica A, Cozzone PJ. Enhanced cardioplegic protection by a fluorocarbon-oxygenated reperfusate: a phosphorus-31 nuclear magnetic resonance study. J Surg Res 1985; 39:216-23. [PMID: 4033105 DOI: 10.1016/0022-4804(85)90145-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Prolonged global ischemia results in a defect in oxygen extraction during early reperfusion. This study was thus undertaken to assess the effects of maintaining cardioplegia at the onset of reoxygenation in view of channeling available energy toward reparative cell processes rather than mechanical activity. Twenty-four isolated perfused rat hearts were subjected to 120 min of 15 degrees C ischemia. Group I (control) was reperfused with the standard Krebs perfusion medium whereas in groups II and III the initial reperfusate consisted of an oxygenated alkaline cardioplegic solution prior to the resumption of Krebs perfusion. Oxygenation of the cardioplegic reperfusate was ensured by fluorocarbons at a concentration of 10% (O2 content: 5.5 vol %; group II) or 20% (O2 content: 9 vol %; group III). In addition to hemodynamical determinations, high-energy phosphates and intracellular pH were monitored serially by phosphorus-31 nuclear magnetic resonance spectroscopy. After 30 min of reperfusion postischemic recovery of aortic flow was better in group II (74.0 +/- 5.9% of control) than in group I (59.1 +/- 5.4% of control, P less than 0.05). This functional improvement correlated with a higher postischemic increase in phosphocreatine levels (103.21 +/- 11.21% vs 74.12 +/- 3.59%, at 3 min of reperfusion, P less than 0.05) without significant differences in total ATP content. Group III hearts exhibited a slow recovery as evidenced by a severe depression in aortic flow, coronary arteriovenous difference, and total phosphate content during the 15 initial minutes of reperfusion. These results show that the protection provided by cardioplegia can be improved by a fluorocarbon-oxygenated cardioplegic reperfusate.(ABSTRACT TRUNCATED AT 250 WORDS)
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377
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Bernard M, Menasche P, Canioni P, Fontanarava E, Grousset C, Piwnica A, Cozzone P. Influence of the pH of cardioplegic solutions on intracellular pH, high-energy phosphates, and postarrest performance. Protective effects of acidotic, glutamate-containing cardioplegic perfusates. J Thorac Cardiovasc Surg 1985; 90:235-42. [PMID: 2410746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The common practice of using alkalotic cardioplegic solutions is not supported by experimental evidence. The present study was conducted to assess the effects of varying the pH (7.00, 7.40, and 7.70 at 20 degrees C) of a glutamate-containing cardioplegic solution on intracellular pH, high-energy phosphate content, and postarrest functional recovery and to compare the effects of various buffers (glutamate, bicarbonate, TRIS, and histidine) at a given pH (7.00 and 7.40). Isolated perfused rat hearts were subjected to 2 hours of cardioplegic arrest at 15 degrees C followed by 30 minutes of reperfusion. Intracellular pH and high-energy phosphate content were measured at 4 minute intervals by phosphorus 31 nuclear magnetic resonance spectroscopy. These data were correlated with postischemic recovery of function. There was no significant difference between the intracellular pH values recorded at the end of arrest in the three glutamate-containing groups. However, the acidotic solution (pH 7.00) resulted in better preservation than the alkalotic solution (pH 7.70), as evidenced by a higher creatine phosphate content at the end of arrest (61% +/- 9% of control values versus 30% +/- 9% [mean +/- standard error of the mean], p less than 0.05), a higher adenosine triphosphate content at the end of reperfusion (102% +/- 5% versus 82% +/- 6%, p less than 0.05), and a faster recovery of aortic flow (at 3 minutes of reperfusion, 91% +/- 11% versus 51% +/- 11%, p less than 0.05). Subsequent comparison of buffers showed that bicarbonate, TRIS, and histidine were equally effective in maintaining intracellular pH close to control values during arrest. Conversely, the use of glutamate resulted in a more pronounced fall in intracellular pH, which correlated with a better preservation of adenosine triphosphate and a better functional recovery than in the other groups. Overall, the greatest extent of preservation was provided by the pH 7.00 glutamate-containing cardioplegic solution. We conclude that additional protection can be conferred to the cold, chemically arrested heart by combining mild intracellular acidosis, which lowers metabolic needs during arrest, most likely through a limitation of calcium overload, and provision of glutamate, which may act as a substrate for anaerobic energy production while allowing intracellular pH to be kept within the appropriate range.
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378
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Renthal R, Cothran M, Espinoza B, Wall KA, Bernard M. Light activates the reaction of bacteriorhodopsin aspartic acid-115 with dicyclohexylcarbodiimide. Biochemistry 1985; 24:4275-9. [PMID: 3931674 DOI: 10.1021/bi00337a004] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Conditions for a light-induced reaction between the carboxyl-modifying reagent N,N'-dicyclohexylcarbodiimide (DCCD) and bacteriorhodopsin in Triton X-100 micelles were previously reported [Renthal, R., Dawson, N., & Villarreal, L. (1981) Biochem. Biophys. Res. Commun. 101, 653-657]. We have now located the DCCD site in the bacteriorhodopsin amino acid sequence. [14C]DCCD-bacteriorhodopsin (0.67 mol/mol of bacteriorhodopsin) was cleaved with CNBr. The resulting peptides were purified by gel filtration and reverse-phase high-performance liquid chromatography (HPLC). One major 14C peptide (50%) and two minor fractions were obtained. The modified peptides were completely absent in the absence of DCCD, and 10 times less was obtained when the reaction was run in the dark. Amino acid analysis and sequence analysis showed that the major fraction contained residues 69-118. This region includes six carboxyl side chains. Quantitative sequence analysis ruled out significant amounts of DCCD at Glu-74, Asp-85, Asp-96, Asp-102, and Asp-104. The major 14C peptide was also subjected to pepsin hydrolysis. HPLC analysis of the product gave only a single major radioactive subfragment. Amino acid analysis of the peptic peptide showed that it contained residues 110-118. The only carboxyl side chain in this region is Asp-115. Thus, we conclude that Asp-115 is the major DCCD site. The light sensitivity of this reaction suggests that Asp-115 becomes more exposed or that its environment becomes more acidic during proton pumping. The DCCD reaction blue-shifts the retinal chromophore. Such a result would be expected if Asp-115 is the negative point charge predicted to be near the cyclohexene ring of retinal.
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379
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Bernard M, Bernard S. Meiotic pairing in hybrids between tetraploid Triticale and related species: new elements concerning the chromosome constitution of tetraploid Triticale. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1985; 70:390-399. [PMID: 24253010 DOI: 10.1007/bf00273744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/1984] [Accepted: 01/23/1985] [Indexed: 06/02/2023]
Abstract
Two F5 strains of tetraploid triticale (2n= 4x=28), obtained from 6x triticaleX2 rye progenies, were crossed with diploid and tetraploid rye, some durum and bread wheats, and various 8x and 6x triticale lines. Meiosis in the different hybrid combinations was studied. The results showed that the haploid complement of these triticales consists of seven chromosomes from rye and seven chromosomes from wheat. High frequencies of PMCs showing trivalents were observed in hybrids involving the reference genotypes of wheat and triticale. These findings proved that several chromosomes from the wheat component have chromosome segments coming from two parental wheat chromosomes. The origin of these heterogeneous chromosomes probably lies in homoeologous pairing occurring at meiosis in the 6x triticaleX2x rye hybrids from which 4x triticale lines were isolated. A comparison among different hybrids combinations indicated that the involvement of D-genome chromosomes in homoeologous pairing is quite limited. In contrast, meiotic patterns in 4x triticale X 2x rye hybrids showed a quite high pairing frequency between some R chromosomes and their A and B homoeologues.
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380
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Bondiou MT, Bourbouze R, Bernard M, Percheron F, Perez-Gonzalez N, Cabezas JA. Inhibition of A and B N-acetyl-beta-D-glucosaminidase urinary isoenzymes by urea. Clin Chim Acta 1985; 149:67-73. [PMID: 4028434 DOI: 10.1016/0009-8981(85)90274-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A urinary fraction which inhibits the activity of N-acetyl-beta-D-glucosaminidase (NAG) has been isolated and identified as being urea. Usually present in high concentration, urea appears to be the only urinary component responsible for the frequently observed urinary NAG inhibition. The inhibition of the two urinary NAG isoenzymes A and B is competitive with respective Ki values of about 70 mmol/l and 60 mmol/l. With routine assay conditions, it seems that a dilution of urine prior to enzyme assay is sufficient to abolish the inhibition of the two isoenzymes A and B by endogenous urea.
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381
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Bibor-Hardy V, Bernard M, Simard R. Nuclear matrix modifications at different stages of infection by herpes simplex virus type 1. J Gen Virol 1985; 66 ( Pt 5):1095-103. [PMID: 2987397 DOI: 10.1099/0022-1317-66-5-1095] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
In BHK-21 cells infected with herpes simplex virus type 1 many virus-induced proteins were found attached to the nuclear matrix. To understand the role of this cell fraction during virogenesis, matrix-associated proteins were analysed at different stages of infection. All the immediate-early protein species were bound to the nuclear matrix and their association with this structure was stable. During the first few hours of infection, the pattern of virus-induced proteins attached to the nuclear matrix remained identical, indicating that polypeptides from the early group are not associated with this cell fraction. Among the late proteins, which are generally structural proteins, 60% of the nuclear proteins were tightly bound to the nuclear matrix. This suggests that the nuclear matrix is involved in at least two different events during virogenesis, regulation of viral infection and assembly of viral capsids.
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382
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Bernard M. Overview of marketing for the pharmacist. TOPICS IN HOSPITAL PHARMACY MANAGEMENT 1985; 5:1-7. [PMID: 10314115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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383
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Chu ML, Weil D, de Wet W, Bernard M, Sippola M, Ramirez F. Isolation of cDNA and genomic clones encoding human pro-alpha 1 (III) collagen. Partial characterization of the 3' end region of the gene. J Biol Chem 1985; 260:4357-63. [PMID: 2579949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
A cDNA library constructed from human fibroblast poly(A+) RNA was screened for the identification of chimeric molecules bearing collagen-specific sequences. Analysis of three of the resulting positive clones showed that they encoded for the COOH-terminal propeptide region of the human Type III collagen. In addition, three overlapping clones covering more than 21 kilobases of the Type III gene were isolated from Charon 4A libraries of human genomic fragments. Identity between these and the cDNA clones was obtained by direct DNA sequencing. Establishment of the exon/intron arrangement of the Type III gene was obtained by electron microscopic analysis in conjunction with sequencing of selected genomic regions. Sequence comparison with other collagen genes confirmed some evolutionary features of this important family of proteins. Finally, the collinearity of two mRNA transcripts with 3' noncoding region length polymorphism was established.
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384
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Chu ML, de Wet W, Bernard M, Ramirez F. Fine structural analysis of the human pro-alpha 1 (I) collagen gene. Promoter structure, AluI repeats, and polymorphic transcripts. J Biol Chem 1985; 260:2315-20. [PMID: 2857713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The human pro-alpha 1(I) collagen gene is 18 kilobases long, and its coding information is subdivided in 51 exons. We have recently reported a detailed analysis of this elaborate structure. Here we describe the exact termini of the gene as well as its 5' flanking sequences (promoter region). Sequence comparison between the human and mouse pro-alpha 1(I) gene showed an unusual highly conserved region 5' to the initiation site of transcription, which may be important for pro-alpha 1(I) collagen expression. Sequence comparison between the pro-alpha 1(I) and other collagen genes revealed the presence of a conserved secondary structure possibly implicated in the regulation of collagen mRNA translation and/or collagen secretion. Two short repetitive sequences closely associated with the pro-alpha 1(I) gene have been identified to be different members of the AluI family of repeats. Like the independently co-expressed pro-alpha 2(I) collagen gene, the analysis of the last exon has revealed that the pro-alpha 1(I) gene transcribes two different mRNAs in cultured fibroblasts. The colinearity and exact location of the termini of these transcripts, as well as their monogenic nature, have been conclusively determined.
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385
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Cornuau C, Bernard M, Daumas PL, Oblet B, Poirot G, Valois M. [Cardiac manifestations of Lyme disease. Apropos of 2 cases]. Ann Cardiol Angeiol (Paris) 1984; 33:395-9. [PMID: 6497303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Lyme disease, a well-known entity in the United States, has featured only rarely in the French literature. We report two cases from the Cardiology Department with acute symptomatic atrio-ventricular block. The illness begins with migratory chronic erythema, which is the best marker of the condition. This is followed by neurological, joint and cardiac manifestations. Cardiac involvement consists essentially in A-V block of varying severity, which rapidly regresses. Until the recent discovery of the arthropod vector responsible (Ixodes dammini), the diagnosis was clinical and was confirmed by negative serological results for the other infectious agents. Penicillin and tetracycline are effective at the skin lesion stage. It is important to recognise this condition since there is no case of complete A-V block lasting longer than 2 weeks.
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386
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Chu ML, de Wet W, Bernard M, Ding JF, Morabito M, Myers J, Williams C, Ramirez F. Human pro alpha 1(I) collagen gene structure reveals evolutionary conservation of a pattern of introns and exons. Nature 1984; 310:337-40. [PMID: 6462220 DOI: 10.1038/310337a0] [Citation(s) in RCA: 177] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The collagens represent an interesting example of a structurally related but genetically distinct family of proteins. Type I, the most abundant of the vertebrate collagens, comprises two pro alpha 1(I) chains and one pro alpha 2(I) chain, each containing terminal propeptides and a central domain of 338 (Gly, X, Y) repeats. The structure of the chicken pro alpha 2(I) gene shows an intriguing relationship between exon organization and the arrangement of (Gly, X, Y) repeats (see ref. 2 for review). This has led to the suggestion that the collagens evolved from a common ancestral unit of 54 base pairs (bp). Here we present the structure of the entire human pro alpha 1(I) gene and compare this with the chicken pro alpha 2(I). The exon arrangement of the two genes is remarkably similar, although the human pro alpha 1(I) is more compact because of the shorter length of its introns. The data strongly support the notion that the type I genes have evolved from an ancestral multi-exon unit, and that once the gene was translated, a strong evolutionary pressure caused it to maintain this elaborate structure.
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387
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Bernard M, Bober M, Krzysztofik B, Skoczna J, Stochla K, Szymczak-Meyer L, Westfal I, Wrzeciono U. [Azoles. 12. Pyrazole carbolic acid thioamides]. DIE PHARMAZIE 1984; 39:464-6. [PMID: 6436841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Morpholids, N-methylpiperazids, piperidids and pyrrolidids of 5-methyl, 3,5-dimethyl-1-phenyl-4-pyrazolthioacetic acid and 3,5-dimethyl-1-phenyl-4-pyrazolcarbonic acid 4-12 are obtained by the Willgerodt-Kindler procedure. The oxothioamids 13-19 result as the intermediate products of the synthesis of thioamids 4-10. The compounds 4, 5, 8, 9, 11, 14 and 17 do not respond to Mycobacterium tuberculosis H37Rv. The thioamids 4, 8 and 11 are of slight toxicity (LD50 greater than 2.8 g/kg, albino-Swiss mice) and inhibit the Carrageenin oedema of the Wistar rat claw minor than phyenylbutazon and indometacin.
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388
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Bernard M. Voluntary care for the elderly mentally infirm and their relatives: a British example. THE GERONTOLOGIST 1984; 24:116-9. [PMID: 6724313 DOI: 10.1093/geront/24.2.116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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389
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Paccalin J, Mendy F, Bernard M, Delhaye N, Spielmann D. [Rediscovery of an oleaginous plant: Oenothera biennis. The importance of gamma-linolenic acid in nutrition]. BULLETIN DE L'ACADEMIE NATIONALE DE MEDECINE 1983; 167:923-31. [PMID: 6324965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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390
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Bernard M, Canioni P, Cozzone PJ. [Study of in vivo cellular metabolism by phosphorus 31 nuclear magnetic resonance]. Biochimie 1983; 65:449-70. [PMID: 6416302 DOI: 10.1016/s0300-9084(83)80127-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Phosphorus-31 nuclear magnetic resonance spectroscopy has been recently increasingly used to study cellular metabolism in a manner respecting the cell integrity. Intrinsic advantages of the phosphorus nucleus for in vivo NMR studies are discussed in this review together with some selected applications. A particular emphasis is layed on metabolite identification and quantitation (relative and absolute concentrations), the measurement of intracellular pH and the problem of cellular compartmentation. The determination of metabolite fluxes under normal and abnormal biological and physiological conditions, and the in vivo direct measurement by saturation transfer techniques of kinetic parameters for enzymatic reactions at equilibrium, are illustrated by several examples taken from the available literature and work carried out in this laboratory. Whenever possible, and appropriate, the NMR approach has been compared with other more classical techniques of investigation. The future and the potentialities of phosphorus-31 NMR study of intact biological systems, the clinical applications and the foreseeable interfacing with imaging techniques are evaluated. The concept of "functional imaging" versus "anatomic imaging" is proposed to illustrate the impact of this new technology in the understanding of cellular mechanisms, not only in the intact cell but also in whole tissues or organs after excision or in living animals and human.
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391
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André JJ, Bernard M, François B, Mathis C. DEPINNING OF CHARGE CARRIERS IN N-TYPE SEMICONDUCTING POLYACETYLENE. ACTA ACUST UNITED AC 1983. [DOI: 10.1051/jphyscol:1983340] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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392
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Paccalin J, Delhaye N, Bernard M, Dabadie H, Mendy F. [Changes in the higher derivatives of linoleic acid in cirrhotics treated with gamma-linolenic acid]. Therapie 1983; 38:326-7. [PMID: 6310813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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393
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Bernard M, Percheron F, Foglietti MJ. On the specificity of the two forms of human serum alpha-L-fucosidase. THE INTERNATIONAL JOURNAL OF BIOCHEMISTRY 1983; 15:1385-7. [PMID: 6642056 DOI: 10.1016/0020-711x(83)90031-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
All normal sera exhibiting either normal or low activities contain two forms of alpha-L-fucosidase (F1 and F2). These two forms, isolated from either type of serum, have respectively similar properties, but the low-activity sera contain a major proportion of the thermolabile, less-acidic form, F1. The specificities for natural substrates (glycoproteins and oligosaccharides) and for synthetic fucosides have been studied. All types of alpha-L-fucosidase linkages (1,2; 1,3; 1,4 and 1,6) are split by the form F2. The specificity of the form F1 is more restricted. Only alpha(1,3) and some types of alpha(1,2) and alpha(1,4) fucosyl linkages are split.
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394
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Jones JR, Romano V, Bernard M, Shaw M, Ramirez F. Clinical use of recombinant DNA techniques: the antenatal diagnosis of sickle cell anemia. THE JOURNAL OF THE MEDICAL SOCIETY OF NEW JERSEY 1982; 79:735-9. [PMID: 6290665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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395
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Guille B, Ducourtieux JP, Bernard M. [Application of a pn junction to determining the quality of an x-ray beam produced by a continuous voltage generator (90 kV-200 kV)]. Phys Med Biol 1982; 27:247-56. [PMID: 7071141 DOI: 10.1088/0031-9155/27/2/006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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396
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Percheron F, Bernard M, Foglietti MJ. [Research on alpha-L-fucosidase in human serum]. BULLETIN DE L'ACADEMIE NATIONALE DE MEDECINE 1982; 166:219-27. [PMID: 6756578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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397
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Guille B, Bernard M. [An example of technical development. Determination of tension and filtration by measurements in a beam]. JOURNAL DE RADIOLOGIE 1981; 62:590-1. [PMID: 7338856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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398
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Francois B, Bernard M, Andre JJ. Isomerization and n‐type doping of polyacetylene: Pure trans‐(CH)x and trans‐(CD)x. J Chem Phys 1981. [DOI: 10.1063/1.442502] [Citation(s) in RCA: 88] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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399
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Bernard M, Foglietti MJ, Percheron F. Properties of two forms of alpha-L-fucosidase isolated from normal human sera with low and high enzymatic activity. Clin Chim Acta 1981; 116:91-9. [PMID: 7318178 DOI: 10.1016/0009-8981(81)90172-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Studies on human alpha-L-fucosidase were performed on normal and low activity sera. After DEAE-Sephacel chromatography, two major forms of enzyme have been characterized in both types of sera. These enzymatic forms were different with respect to their thermostability and electrofocusing behaviour. The less acidic form (I) was thermolabile. In contrast, the more acidic one (II) was thermostable. But the forms I and II had respectively similar properties when isolated from either normal or low activity sera. These results suggest the presence in both types of sera of two major forms of alpha-L-fucosidase but in variable proportions. The low activity sera contained a major proportion of the thermolabile less acidic form when compared with normal activity sera.
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400
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Stocker S, Grimaud JA, Druguet M, Bernard M, Durand L. [Ultrastructural changes in the fibrillar connective matrix of the trabeculum in glaucoma]. BULLETIN DES SOCIETES D'OPHTALMOLOGIE DE FRANCE 1981; 81:527-8. [PMID: 7261245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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