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104 results on '"Ehrhart, L A"'

1. Royal academy of medicine in Ireland international conference on homocysteine metabolism from basic science to clinical medicine: Proceedings of meeting held at Dromoland Castle, Co. Clare on July 2nd–6th, 1995

Author

Björkegren, K., Bergmark, C., de Faire, U., Mansoor, M. Azam, Svardal, A., Bostom, A. G., Roubenoff, R., Dellaripa, P., Nadeau, M. R., Sutherland, P., Wilson, P. W. F., Jacques, P. F., Selhub, J., Rosenberg, I. H., Bostom, A. G., Brosnan, J. T., Hall, B., Nadeau, M. R., Selhub, J., Bostom, A. G., Shemin, D., Lapane, K. L., Sutherland, P., Nadeau, M. R., Wilson, P. W. F., Selhub, J., Bostom, A. G., Shemin, D., Nadeau, M. R., Selhub, J., Bostom, A. G., Selhub, J., Jacques, P. F., Nadeau, M. R., Williams, R. R., Ellison, R. C., Cuskelly, G. J., McNulty, H., Strain, J. J., McPartlin, J. M., Scott, J. M., Chadefaux-Vekemans, B., Coudé, M., Aupetit, J., Kamoun, P., Coudé, M., Aral, B., Zabot, M. T., Aupetit, J., Kamoun, P., Chadefaux-Vekemans, B., Calaf, R., Ghiringelli, O., Barlatier, A., Charpiot, P., Rolland, P. H., Garçon, D., Charpiot, P., Augier, T., Chareyre, C., Rolland, P. H., Garçon, D., Chango, A., Hodez, F., Tronel, H., Nuel, G., Michel, F., Frémont, S., Méjean, L., Nicolas, J. P., Candito, M., Chambon, P., Gibelin, P., Amsellem, J., Baudouy, M., Morand, P., Candito, M., Chambon, P., Pringuey, D., Aubin-Brunet, V., Beaulieu, F., Darcourt, G., Bedoucha, P., Alchaar, H., Chatel, M., Candito, M., de Valk, H. W., van der Griend, R., Eeden, M. K. G. van, de Groot, E., Duran, M., Smeitink, J. A. M., de Klerk, J. B. C., Wittebol-Post, D., Rolland, M. -O., Haas, F. J. L. M., Meuwissen, O. J. A. Th., Banga, J. D., Poll-The, B. T., de Vries, J. I. P., Dekker, G. A., van Geijn, H. P., Huigens, P. C., Jakobs, C., von Blomberg, B. M. E., Deulofeu, R., Giralt, M., Aibar, C., Bauchet, C., Ballesta, A. M., Varela, G., Vila, N., Chamorro, A., Casals, F. J., Cremades, J. Diaz, Daly, L., Meleady, R., Graham, I., den Heijer, M., Brouwer, I. A., Gerrits, W. B. J., Bos, G. M. J., Blom, H. J., den Heijer, M., Bos, G. M. J., Koster, T., Vandenbroucke, J. P., Blom, H. J., Briët, E., Rosendaal, F. R., Fischer, G., Behrend, C., Bartholmes, P., Fermo, I., Paroni, R., Vigano, S., D’Angelo, A., Fermo, I., Paroni, R., Vigano, S., D’Angelo, A., Franken, D. G., Boers, G. H. J., Blom, H. J., Hamel, B. C. J., Franken, D. G., Boers, G. H. J., Blom, H. J., Ruijs, J. H. J., Franken, D. G., Blom, H. J., Boers, G. H. J., Tangerman, A., Guttormsen, A. B., Ueland, P. M., Refsum, H., Svarstad, E., Gao, W., Goldman, E., Jakubowski, H., Sebastio, G., Sperandeo, M. P., de Franchis, R., Andria, G., Garrow, T. A., Hladovec, J., Sommerova, Z., Písariková, A., Halsted, C. H., Villanueva, J., Chandler, C. J., Stabler, S. P., Allen, R. H., Muskhelishvili, L., James, S. J., Poirer, L., Jacobsen, D. W., Savon, S. R., DiCorleto, P. E., Jourdheuil-Rahmani, D., Rolland, P. H., Garçon, D., Joosten, E., Riezler, R., Allen, R., Joosten, E., Riezler, R., Allen, R., Marquardt, T., Ullrich, K., Harms, E., Koch, H. G., Koch, H. G., Evers, S., Grotemeyer, K. H., Vogelpohl, L., von Eckardstein, A., Ullrich, K., Deufel, T., Kraus, J., Harms, E., Kozich, V., Janosik, M., Sokolová, J., Bukovská, G., Kraus, J. P., Kluitmans, L. A. J., van den Heuvel, L. P., Stevens, E., Trubels, J. M. F., Blom, H. J., Boers, G. H. J., van Oost, B. A., Kraus, J. P., Kittner, S., Macko, R., Hebel, J. R., Rohr, J., Malinow, M. R., Upson, B., Buchholz, D., Earley, C., Johnson, C., Price, T. R., Rosario, J., Sloan, M., Stern, B., Wityk, R., Wozniak, M., Sherwin, R., Stolley, P., Kluijtmans, L., Heuvel, L. van den, Stevens, E., Trijbels, F., Blom, H., Boers, G., van Oost, B., den Heijer, M., Rozen, R., Löhrer, F., Angst, C., Fowler, B., Zaugg, M., Brunner, F., Haefeli, W. E., Nedrebø, B., Ericsson, U. -B., Ueland, P. M., Refsum, H., Lien, E. A., London, J., Paly, E., Paul, V., Paris, D., Kamoun, P., Chassé, J. F., Møller, J., Rasmussen, K., Meleady, R., Graham, I., Daly, L., Verhoef, P., Meleady, R., Graham, I., Daly, L., McMartin, K. E., Phifer, T. J., Alexander, J. S., Middlebrooks, M., Childress, L. E., Nicolas, J. P., Tronel, H., Chango, A., Fremont, S., Felden, F., Guerci, B., Creton, C., Drouin, P., Oakley, G. P., Elias, P. R. P., Hann, A. C., Curtis, C. G., Rose, F. A., Tudball, N., Parrot-Roulaud, F., Cochet, C., Catargi, B., Leprat, F., Latapie, J. -L., Perna, A. F., De Santo, N. G., Ingrosso, D., Galletti, P., Zappia, V., Parrot-Roulaud, F., Sassoust, G., Boissieras, P., Blom, H. J., Majors, A. K., Ehrhart, L. A., Pezacka, E. H., Perry, I. J., Morris, R. W., Ebrahim, S. B., Shaper, A. G., Refsum, H., Ueland, P. M., Pietrzik, K., Dierkes, J., Kroesen, M., Bung, P., Rasmussen, K., Moller, J., Rasmussen, K., Remacha, A., Garcia-Die, F., Cadafalch, J., Barceló, H. J., Parellada, H., Regland, B., Gottfries, C. -G., Andersson, M., Bagby, J., Dyrehag, L. -E., Abrahamsson, L., Ronge, E., Kjellman, B., Frosst, P., Christensen, B., Goyette, P., Rosenblatt, D. S., Genest, J., Rozen, R., Riedel, B., Ueland, P. M., Svardal, A. M., Silberberg, J., Crooks, R., Fryer, J., Ray, C., Guo, X. W., Xie, L., Dudman, N., Silberberg, J., Crooks, R., Fryer, J., Ray, C., Guo, X. W., Xie, L., Dudman, N., Silberberg, J., Crooks, R., Fryer, J., Ray, C., Guo, X., Xie, L., Dudman, N., Smith, B., Kohlman-Trigoboff, D., Simsir, S., Stabler, S. P., Allen, R. H., Strydom, A. J. C., Schlüssel, E., Preibisch, G., Elstner, E. F. E., Pütter, S., Spuijbroek, M. D. E. H., Goddijn-Wessel, T. A. W., Wouters, M. G. A. J., Molen, E. F. v. d., Blom, H. J., Boers, G. H. J., Steegers-Theunissen, R. P. M., Trijbels, J. M. F., Thomas, C. M. G., Eskes, T. K. A. B., Tsai, M. Y., Hanson, N., Key, N., Schwichtenberg, K., Garg, U., Todesco, L., Fowler, B., Pollaert, N., Haefeli, W. E., Thorand, B., Hages, M., Pietrzik, K., Bung, P., Holzgreve, W., Vila, N., Chamorro, A., Deulofeu, R., Aibar, C., Giralt, M., Ballesta, A. M., van der Mooren, M. J., Wouters, M. G. A. J., Schellekens, L. A., Eskes, T. K. A. B., Rolland, R., Blom, H. J., Put, N. v. d., Trijbels, F., Heuvel, L. v. d., Blom, H., Eskes, T., Steegers-Theunissen, R., Mariman, E., Heyer, M. d., Rozen, R., Daher, R., Van Lente, F., Vilkovsky, A. B., Maev, I. V., Richter, E. L., Kirnus, M. D., Varela-Moreiras, G., Alonso-Aperte, E., Rubio, M., Gassó, M., Deulofeu, R., Alvarez, L., Caballeria, J., Rodés, J., Mato, J. M., van Aerts, L. A. G. J. M., Peereboom-Stegeman, J. H. J. Copius, Noordhoek, J., Eskes, T. K. A. B., Molen, E. F. v. d., Spuijbroek, M. D. E. H., Eskes, T. K. A. B., Heuvel, L. P. v. d., Monnens, L. A. H., Blom, H. J., van Guidener, C., Janssen, M. J. F. M., Surachno, J., Stehouwer, C. D. A., van den Berg, M., Bierdrager, E., Rauwerda, J. A., Wilcken, B., Hammond, J., Wouters, M. G. A. J., Hamilton, C. J. C. M., Blom, H. J., Boers, G. H. J., Thomas, C. M. G., Borm, G. F., Eskes, T. K. A. B., Wang, H., Tsai, J. -C., Perrella, M. A., Yoshizumi, M., Sibinga, N. E. S., Haber, E., Chang, T. H. -T., Schlegel, R., Lee, M. -E., Woodside, J., McMaster, D., Yarnell, J., Young, I., Mercer, C., Byrne, K., Evans, A., Gey, F., Gao, X. M., Dougan, G., Wordsworth, P., McMichael, A., Young, P. B., Kennedy, D. G., Molloy, A. M., Scott, J. M., Ward, P., Naughten, E., Cahalane, S., Murphy, D., Mayne, P., Chauveau, P., Chadefaux-Vekemans, B., Coudé, M., Aupetit, J., Kamoun, P., Jungers, P., van Asselt, D. Z. B., Blom, H. J., de Wild, G. M., van Staveren, W. A., Hoefnagels, W. H. L., Naruszewicz, M., Staniewicz, A., Dziewanowski, K., Evrovski, J., Cole, D. E. C., Callaghan, Michael, Lindgren, A., Brattström, L., Hultberg, B., Verhoef, P., Hennekens, C. H., Allen, R. H., Stabler, S. P., Willett, W. C., Stampfer, M. J., Frantzen, F., Sundrehagen, E., Verhoef, P., Kok, F. J., Stampfer, M. J., Willett, W. C., Gaziano, J. M., Hennekens, C. H., Allen, R. H., Stabler, S. P., Reynolds, R. D., Hsu, R. -J., Shane, B., Robinson, K., Kottke-Marchant, K., Green, R., Gupta, A., Jacobsen, D., Robinson, K., Mayer, E., Gupta, A., Miller, D., Marchant, K., Green, R., Jacobsen, D., Greene, R., Chong, Y. -Y., Jacobsen, D., Robinson, K., Gupta, M., Sheppard, C. A., Matthews, R. G., Goyette, P., Frosst, P., Rozen, R., Verhoef, P., Kok, F. J., Kruyssen, H. A. C. M., Witteman, J. C. M., Ueland, P. M., Boushey, C., Beresford, S., Omenn, G., Motulsky, A. G., Nygard, O., Vollset, S. E., Kvale, G., Stensvold, I., Ueland, P. M., Refsum, H., Fiskerstrand, T., Ueland, P. M., Refsum, H., Bugge, K. H., Oshaug, A., Bjønnes, C. H., Refsum, H., Wu, J. T., Wu, L. L., and Wilson, L. W.

Published
1995
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8. Collaborative prototyping approaches for ICU decision aid design

Author

Ehrhart, L. S., Hanson, C. W., Marshall, B. E., Marshall, C., and Medsker, C.

Subjects
Systems Integration, Intensive Care Units, Respiratory Therapy, Computer Systems, Workforce, Humans, Expert Systems, Ergonomics, Decision Support Systems, Clinical, Decision Making, Computer-Assisted, Research Article
Abstract

When computer-based aids do not support the human users' decision-making strategies or anticipate the organizational impacts of technological change, advances in information technology may degrade rather than enhance decision-making performance. Such failures suggest the design of human-computer cooperation for problem solving and decision-making must be driven by human cognitive and organizational process requirements rather than computer technology. Decision- and user-centered development techniques involve domain experts and end-users in the earliest phases of design to evolve an understanding of requirements through iterative prototyping. This paper presents a collaborative approach to cognitive systems engineering applied to developing a clinical aid to assist respiratory care in the surgical ICU.

Published
1999

9. Sea level rise, land use, and climate change influence the distribution of loggerhead turtle nests at the largest USA rookery (Melbourne Beach, Florida)

Author

Reece, JS, primary, Passeri, D, additional, Ehrhart, L, additional, Hagen, SC, additional, Hays, A, additional, Long, C, additional, Noss, RF, additional, Bilskie, M, additional, Sanchez, C, additional, Schwoerer, MV, additional, Von Holle, B, additional, Weishampel, J, additional, and Wolf, S, additional

Published
2013
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10. Grand Rounds

Author

Fayolle, G., primary, Levick, W., additional, Lajiness-O'Neill, R., additional, Fastenau, P., additional, Briskin, S., additional, Bass, N., additional, Silva, M., additional, Critchfield, E., additional, Nakase-Richardson, R., additional, Hertza, J., additional, Loughan, A., additional, Perna, R., additional, Northington, S., additional, Boyd, S., additional, Anderson, A., additional, Peery, S., additional, Chafetz, M., additional, Maris, M., additional, Ramezani, A., additional, Sylvester, C., additional, Goldberg, K., additional, Constantinou, M., additional, Karekla, M., additional, Hall, J., additional, Edwards, M., additional, Balldin, V., additional, Strutt, A., additional, Pavlik, V., additional, Marquez de la Plata, C., additional, Cullum, M., additional, lacritz, l., additional, Reisch, J., additional, Massman, P., additional, Royall, D., additional, Barber, R., additional, Younes, S., additional, Wiechmann, A., additional, O'Bryant, S., additional, Patel, K., additional, Suhr, J., additional, Chari, S., additional, Yokoyama, J., additional, Bettcher, B., additional, Karydas, A., additional, Miller, B., additional, Kramer, J., additional, Zec, R., additional, Fritz, S., additional, Kohlrus, S., additional, Robbs, R., additional, Ala, T., additional, Gifford, K., additional, Cantwell, N., additional, Romano, R., additional, Jefferson, A., additional, Holland, A., additional, Newton, S., additional, Bunting, J., additional, Coe, M., additional, Carmona, J., additional, Harrison, D., additional, Puente, A., additional, Terry, D., additional, Faraco, C., additional, Brown, C., additional, Patel, A., additional, Watts, A., additional, Kent, A., additional, Siegel, J., additional, Miller, S., additional, Ernst, W., additional, Chelune, G., additional, Holdnack, J., additional, Sheehan, J., additional, Duff, K., additional, Pedraza, O., additional, Crawford, J., additional, Miller, L., additional, Hobson Balldin, V., additional, Benavides, H., additional, Johnson, L., additional, Tshuma, L., additional, Dezhkam, N., additional, Hayes, L., additional, Love, C., additional, Stephens, B., additional, Webbe, F., additional, Mulligan, K., additional, Dunham, K., additional, Shadi, S., additional, Sofko, C., additional, Denney, R., additional, Rolin, S., additional, Sibson, J., additional, Ogbeide, S., additional, Glover, M., additional, Warchol, A., additional, Hunter, B., additional, Nichols, C., additional, Riccio, C., additional, Cohen, M., additional, Dennison, A., additional, Wasserman, T., additional, Schleicher-Dilks, S., additional, Adler, M., additional, Golden, C., additional, Olivier, T., additional, LeMonda, B., additional, McGinley, J., additional, Pritchett, A., additional, Chang, L., additional, Cloak, C., additional, Cunningham, E., additional, Lohaugen, G., additional, Skranes, J., additional, Ernst, T., additional, Parke, E., additional, Thaler, N., additional, Etcoff, L., additional, Allen, D., additional, Andrews, P., additional, McGregor, S., additional, Daniels, R., additional, Hochsztein, N., additional, Miles-Mason, E., additional, Granader, Y., additional, Vasserman, M., additional, MacAllister, W., additional, Casto, B., additional, Patrick, K., additional, Hurewitz, F., additional, Chute, D., additional, Booth, A., additional, Koch, C., additional, Roid, G., additional, Balkema, N., additional, Kiefel, J., additional, Bell, L., additional, Maerlender, A., additional, Belkin, T., additional, Katzenstein, J., additional, Semerjian, C., additional, Culotta, V., additional, Band, E., additional, Yosick, R., additional, Burns, T., additional, Arenivas, A., additional, Bearden, D., additional, Olson, K., additional, Jacobson, K., additional, Ubogy, S., additional, Sterling, C., additional, Taub, E., additional, Griffin, A., additional, Rickards, T., additional, Uswatte, G., additional, Davis, D., additional, Sweeney, K., additional, Llorente, A., additional, Boettcher, A., additional, Hill, B., additional, Ploetz, D., additional, Kline, J., additional, Rohling, M., additional, O'Jile, J., additional, Holler, K., additional, Petrauskas, V., additional, Long, J., additional, Casey, J., additional, Duda, T., additional, Hodsman, S., additional, Stricker, S., additional, Martner, S., additional, Hansen, R., additional, Ferraro, F., additional, Tangen, R., additional, Hanratty, A., additional, Tanabe, M., additional, O'Callaghan, E., additional, Houskamp, B., additional, McDonald, L., additional, Pick, L., additional, Guardino, D., additional, Pietz, T., additional, Kayser, K., additional, Gray, R., additional, Letteri, A., additional, Crisologo, A., additional, Witkin, G., additional, Sanders, J., additional, Mrazik, M., additional, Harley, A., additional, Phoong, M., additional, Melville, T., additional, La, D., additional, Gomez, R., additional, Berthelson, L., additional, Robbins, J., additional, Lane, E., additional, Rahman, P., additional, Konopka, L., additional, Fasfous, A., additional, Zink, D., additional, Peralta-Ramirez, N., additional, Perez-Garcia, M., additional, Su, S., additional, Lin, G., additional, Kiely, T., additional, Schatzberg, A., additional, Keller, J., additional, Dykstra, J., additional, Feigon, M., additional, Renteria, L., additional, Fong, M., additional, Piper, L., additional, Lee, E., additional, Vordenberg, J., additional, Contardo, C., additional, Magnuson, S., additional, Doninger, N., additional, Luton, L., additional, Drane, D., additional, Phelan, A., additional, Stricker, W., additional, Poreh, A., additional, Wolkenberg, F., additional, Spira, J., additional, DeRight, J., additional, Jorgensen, R., additional, Fitzpatrick, L., additional, Crowe, S., additional, Woods, S., additional, Doyle, K., additional, Weber, E., additional, Cameron, M., additional, Cattie, J., additional, Cushman, C., additional, Grant, I., additional, Blackstone, K., additional, Moore, D., additional, Roberg, B., additional, Somogie, M., additional, Thelen, J., additional, Lovelace, C., additional, Bruce, J., additional, Gerstenecker, A., additional, Mast, B., additional, Litvan, I., additional, Hargrave, D., additional, Schroeder, R., additional, Buddin, W., additional, Baade, L., additional, Heinrichs, R., additional, Boseck, J., additional, Berry, K., additional, Koehn, E., additional, Davis, A., additional, Meyer, B., additional, Gelder, B., additional, Sussman, Z., additional, Espe-Pfeifer, P., additional, Musso, M., additional, Barker, A., additional, Jones, G., additional, Gouvier, W., additional, Johnson, V., additional, Zaytsev, L., additional, Freier-Randall, M., additional, Sutton, G., additional, Ringdahl, E., additional, Olsen, J., additional, Byrd, D., additional, Rivera-Mindt, M., additional, Fellows, R., additional, Morgello, S., additional, Wheaton, V., additional, Jaehnert, S., additional, Ellis, C., additional, Olavarria, H., additional, Loftis, J., additional, Huckans, M., additional, Pimental, P., additional, Frawley, J., additional, Welch, M., additional, Jennette, K., additional, Rinehardt, E., additional, Schoenberg, M., additional, Strober, L., additional, Genova, H., additional, Wylie, G., additional, DeLuca, J., additional, Chiaravalloti, N., additional, Ibrahim, E., additional, Seiam, A., additional, Bohlega, S., additional, Lloyd, H., additional, Goldberg, M., additional, Marceaux, J., additional, Fallows, R., additional, McCoy, K., additional, Yehyawi, N., additional, Luther, E., additional, Hilsabeck, R., additional, Fulton, R., additional, Stevens, P., additional, Erickson, S., additional, Dodzik, P., additional, Williams, R., additional, Dsurney, J., additional, Najafizadeh, L., additional, McGovern, J., additional, Chowdhry, F., additional, Acevedo, A., additional, Bakhtiar, A., additional, Karamzadeh, N., additional, Amyot, F., additional, Gandjbakhche, A., additional, Haddad, M., additional, Johnson, M., additional, Wade, J., additional, Harper, L., additional, Barghi, A., additional, Mark, V., additional, Christopher, G., additional, Marcus, D., additional, Spady, M., additional, Bloom, J., additional, Zimmer, A., additional, Miller, M., additional, Schuster, D., additional, Ebner, H., additional, Mortimer, B., additional, Palmer, G., additional, Happe, M., additional, Paxson, J., additional, Jurek, B., additional, Graca, J., additional, Meyers, J., additional, Lange, R., additional, Brickell, T., additional, French, L., additional, Iverson, G., additional, Shewchuk, J., additional, Madler, B., additional, Heran, M., additional, Brubacher, J., additional, Ivins, B., additional, Baldassarre, M., additional, Paper, T., additional, Herrold, A., additional, Chin, A., additional, Zgaljardic, D., additional, Oden, K., additional, Lambert, M., additional, Dickson, S., additional, Miller, R., additional, Plenger, P., additional, Sutherland, E., additional, Glatts, C., additional, Schatz, P., additional, Walker, K., additional, Philip, N., additional, McClaughlin, S., additional, Mooney, S., additional, Seats, E., additional, Carnell, V., additional, Raintree, J., additional, Brown, D., additional, Hodges, C., additional, Amerson, E., additional, Kennedy, C., additional, Moore, J., additional, Ferris, C., additional, Roebuck-Spencer, T., additional, Vincent, A., additional, Bryan, C., additional, Catalano, D., additional, Warren, A., additional, Monden, K., additional, Driver, S., additional, Chau, P., additional, Seegmiller, R., additional, Baker, M., additional, Malach, S., additional, Mintz, J., additional, Villarreal, R., additional, Peterson, A., additional, Leininger, S., additional, Strong, C., additional, Donders, J., additional, Merritt, V., additional, Vargas, G., additional, Rabinowitz, A., additional, Arnett, P., additional, Whipple, E., additional, Schultheis, M., additional, Robinson, K., additional, Iacovone, D., additional, Biester, R., additional, Alfano, D., additional, Nicholls, M., additional, Klas, P., additional, Jeffay, E., additional, Zakzanis, K., additional, Vandermeer, M., additional, Womble, M., additional, Corley, E., additional, Considine, C., additional, Fichtenberg, N., additional, Harrison, J., additional, Pollock, M., additional, Mouanoutoua, A., additional, Brimager, A., additional, Lebby, P., additional, Sullivan, K., additional, Edmed, S., additional, Kieffer, K., additional, McCarthy, M., additional, Wiegand, L., additional, Lindsey, H., additional, Hernandez, M., additional, Noniyeva, Y., additional, Lapis, Y., additional, Padua, M., additional, Poole, J., additional, Brooks, B., additional, McKay, C., additional, Meeuwisse, W., additional, Emery, C., additional, Mazur-Mosiewicz, A., additional, Sherman, E., additional, Kirkwood, M., additional, Gunner, J., additional, Miele, A., additional, Silk-Eglit, G., additional, Lynch, J., additional, McCaffrey, R., additional, Stewart, J., additional, Tsou, J., additional, Scarisbrick, D., additional, Chan, R., additional, Bure-Reyes, A., additional, Cortes, L., additional, Gindy, S., additional, Biddle, C., additional, Shah, D., additional, Jaberg, P., additional, Moss, R., additional, Horner, M., additional, VanKirk, K., additional, Dismuke, C., additional, Turner, T., additional, Muzzy, W., additional, Dunnam, M., additional, Warner, G., additional, Donnelly, K., additional, Donnelly, J., additional, Kittleson, J., additional, Bradshaw, C., additional, Alt, M., additional, Margolis, S., additional, Ostroy, E., additional, Higgins, K., additional, Eng, K., additional, Akeson, S., additional, Wall, J., additional, Davis, J., additional, Hansel, J., additional, Wang, B., additional, Gervais, R., additional, Greiffenstein, M., additional, Denning, J., additional, VonDran, E., additional, Campbell, E., additional, Brockman, C., additional, Teichner, G., additional, Waid, R., additional, Buican, B., additional, Armistead-Jehle, P., additional, Bailie, J., additional, Dilay, A., additional, Cottingham, M., additional, Boyd, C., additional, Asmussen, S., additional, Neff, J., additional, Schalk, S., additional, Jensen, L., additional, DenBoer, J., additional, Hall, S., additional, Holcomb, E., additional, Axelrod, B., additional, Demakis, G., additional, Rimland, C., additional, Ward, J., additional, Ross, M., additional, Bailey, M., additional, Stubblefield, A., additional, Smigielski, J., additional, Geske, J., additional, Karpyak, V., additional, Reese, C., additional, Larrabee, G., additional, Allen, L., additional, Celinski, M., additional, Gilman, J., additional, LaDuke, C., additional, DeMatteo, D., additional, Heilbrun, K., additional, Swirsky-Sacchetti, T., additional, Dedman, A., additional, Withers, K., additional, Deneen, T., additional, Fisher, J., additional, Spray, B., additional, Savage, R., additional, Wiener, H., additional, Tyer, J., additional, Ningaonkar, V., additional, Devlin, B., additional, Go, R., additional, Sharma, V., additional, Fontanetta, R., additional, Calderon, C., additional, Coad, S., additional, Fontaneta, R., additional, Vertinski, M., additional, Verbiest, R., additional, Snyder, J., additional, Kinney, J., additional, Rach, A., additional, Young, J., additional, Crouse, E., additional, Schretlen, D., additional, Weaver, J., additional, Buchholz, A., additional, Gordon, B., additional, Macciocchi, S., additional, Seel, R., additional, Godsall, R., additional, Brotsky, J., additional, DiRocco, A., additional, Houghton-Faryna, E., additional, Bolinger, E., additional, Hollenbeck, C., additional, Hart, J., additional, Lee, B., additional, Strauss, G., additional, Adams, J., additional, Martins, D., additional, Catalano, L., additional, Waltz, J., additional, Gold, J., additional, Haas, G., additional, Brown, L., additional, Luther, J., additional, Goldstein, G., additional, Kelley, E., additional, Raba, C., additional, Trettin, L., additional, Solvason, H., additional, Buchanan, R., additional, Baldock, D., additional, Etherton, J., additional, Phelps, T., additional, Richmond, S., additional, Tapscott, B., additional, Thomlinson, S., additional, Cordeiro, L., additional, Wilkening, G., additional, Parikh, M., additional, Graham, L., additional, Grosch, M., additional, Hynan, L., additional, Weiner, M., additional, Cullum, C., additional, Menon, C., additional, Lacritz, L., additional, Castro-Couch, M., additional, Irani, F., additional, Houshyarnejad, A., additional, Norman, M., additional, Fonseca, F., additional, Browne, B., additional, Alvarez, J., additional, Jiminez, Y., additional, Baez, V., additional, Resendiz, C., additional, Scott, B., additional, Farias, G., additional, York, M., additional, Lozano, V., additional, Mahoney, M., additional, Hernandez Mejia, M., additional, Pacheco, E., additional, Homs, A., additional, Ownby, R., additional, Nici, J., additional, Hom, J., additional, Lutz, J., additional, Dean, R., additional, Finch, H., additional, Pierce, S., additional, Moses, J., additional, Mann, S., additional, Feinberg, J., additional, Choi, A., additional, Kaminetskaya, M., additional, Pierce, C., additional, Zacharewicz, M., additional, Gavett, B., additional, Horwitz, J., additional, Ory, J., additional, Carbuccia, K., additional, Morra, L., additional, Garcon, S., additional, Lucas, M., additional, Donovick, P., additional, Whearty, K., additional, Campbell, K., additional, Camlic, S., additional, Brinckman, D., additional, Ehrhart, L., additional, Weisser, V., additional, Medaglia, J., additional, Merzagora, A., additional, Reckess, G., additional, Ho, T., additional, Testa, S., additional, Woolery, H., additional, Farcello, C., additional, Klimas, N., additional, Meyer, J., additional, Barwick, F., additional, Drayer, K., additional, Galusha, J., additional, Schmitt, A., additional, Livingston, R., additional, Stewart, R., additional, Quarles, L., additional, Pagitt, M., additional, Barke, C., additional, Baker, A., additional, Baker, N., additional, Cook, N., additional, Ahern, D., additional, Correia, S., additional, Resnik, L., additional, Barnabe, K., additional, Gnepp, D., additional, Benjamin, M., additional, Zlatar, Z., additional, Garcia, A., additional, Harnish, S., additional, Crosson, B., additional, Vaughan, L., additional, Fedio, A., additional, Sexton, J., additional, Cummings, S., additional, Logemann, A., additional, Lassiter, N., additional, Fedio, P., additional, Gremillion, A., additional, Nemeth, D., additional, Whittington, T., additional, Reckow, J., additional, Lewandowski, C., additional, Cole, J., additional, Lewandowski, A., additional, Spector, J., additional, Ford-Johnson, L., additional, Lengenfelder, J., additional, Sumowski, J., additional, Morse, C., additional, McKeever, J., additional, Zhao, L., additional, Leist, T., additional, Marcinak, J., additional, Piecora, K., additional, Al-Khalil, K., additional, Martin, P., additional, Thompson, L., additional, Kowalczyk, W., additional, Golub, S., additional, Lemann, E., additional, Piehl, J., additional, Rita, N., additional, Moss, L., additional, Nogin, R., additional, Drapeau, C., additional, Malm, S., additional, Armstrong, L., additional, Glidewell, R., additional, Orr, W., additional, Mears, G., additional, Allen, C., additional, Pierson, E., additional, Kavanaugh, B., additional, Tayim, F., additional, Llanes, S., additional, Poston, K., additional, Beathard, J., additional, Stolberg, P., additional, Jones, W., additional, Mayfield, J., additional, Weller, J., additional, Demireva, P., additional, McInerney, K., additional, Riddle, T., additional, Primus, M., additional, Highsmith, J., additional, Everhart, D., additional, Lehockey, K., additional, Sullivan, S., additional, Mandava, S., additional, Murphy, B., additional, Lalwani, L., additional, Rosselli, M., additional, Carrasco, R., additional, Zuckerman, S., additional, Brand, J., additional, Rivera Mindt, M., additional, Schaffer, S., additional, Alper, K., additional, Devinsky, O., additional, Barr, W., additional, Langer, K., additional, Fraiman, J., additional, Scagliola, J., additional, Roman, E., additional, Martinez, A., additional, Konopacki, K., additional, Juliano, A., additional, Whiteside, D., additional, Widmann, G., additional, Franzwa, M., additional, Sokal, B., additional, Morgan, E., additional, Bondi, M., additional, Delano-Wood, L., additional, Cormier, R., additional, Cumley, N., additional, Elek, M., additional, Green, M., additional, Kruger, A., additional, Pacheco, L., additional, Robinson, G., additional, Welch, H., additional, Parriott, D., additional, Loe, S., additional, Hughes, L., additional, Natta, L., additional, Quenicka, W., additional, McGoldirck, K., additional, Bennett, T., additional, Soper, H., additional, Collier, S., additional, Connolly, M., additional, Di Pinto, M., additional, Handel, E., additional, Davidson, K., additional, Livers, E., additional, Frantz, S., additional, Allen, J., additional, Jerard, T., additional, Sakhai, S., additional, Barney, S., additional, McGoldrick, K., additional, Sordahl, J., additional, Torrence, N., additional, and John, S., additional

Published
2012
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13. A continuation of base-line studies for environmentally monitoring Space Transportation Systems (STS) at John F. Kennedy Space Center. Volume 4: Threatened and endangered species of the Kennedy Space Center. Part 1: Marine turtle studies

Author

Ehrhart, L. M

Subjects
Environment Pollution
Abstract

The status of marine turtle populations in the KSC area was studied using data from previous results from ground and aerial surveillance conducted from 1976 to April 1979. During ground surveillance, various data were recorded on emergent turtles such as: species, weight, tag number (if previously tagged), time discovered, activity at discovery and the location of discovery. Observations were also made on nesting and reproductive characteristics, population estimates, immigration and emigration and growth rate of the turtles. Mortality studies were additionally made and autopsies performed on dead turtles found in the area. It is concluded that further mortality documentation should be done just prior to and just after a future space launch operation in order to accurately assess the cause and effect relationship of such a launch on the turtle population.

Published
1980

14. A continuation of base-line studies for environmentally monitoring Space Transportation Systems (STS) at John F. Kennedy Space Center. Volume 4: Threatened and endangered species of the Kennedy Space Center. Part 2: Threatened and endangered birds and other threatened and endangered forms

Author

Ehrhart, L. M

Subjects
Environment Pollution
Abstract

Data are presented which were collected by ground and aerial surveillance of 37 species of birds observed within the environs of KSC which are on lists of rare and endangered biota in Florida. Additional information was obtained on other threatened species such as the West Indian manatee, the salt marsh snake, the Indigo snake, the Gopher tortoise, the American alligator, and the Florida mouse. Results of the literature search were used to obtain a historical perspective and aid in the analysis of the field data collected.

Published
1980

15. Temperature comparison of caretta caretta nesting beaches throughout Florida

Author

Estes, J., Wibbels, T., Wyneken, J., Ehrhart, L., Tucker, T., Carthy, R., Bresett, M., and Johnson, C.

Subjects
Loggerhead turtle -- Behavior, Nest building -- Environmental aspects, Zoology and wildlife conservation
Abstract

Loggerhead sea turtles are well known for nesting in the southeastern U.S. Loggerheads possess temperature-dependent sex determination which has conservation and ecological implications. The current study represents a comprehensive and simultaneous comparison of nesting beach temperatures throughout the range of major loggerhead nesting beaches in Florida. Beach temperatures were monitored at mid-nest depth (40 cm) in areas where the majority of nesting occurred. Beach temperatures were monitored for two nesting seasons using data loggers on 8 to 13 loggerhead nesting beaches throughout Florida. Although data loggers were lost on several of the nesting beaches due to the abundance of hurricanes, data was obtained from many of the beaches. In general, beach temperatures during the nesting seasons varied relative to weather and, in particular, to precipitation. Most temperatures recorded at mid-nest depth were within a range of 26-32[degrees]C, with an approximate average of 30[degrees]C. Preliminary analysis suggests that temperatures recorded on a single beach tended to be similar. The results also indicare that some beaches may be consistently warmer or cooler than others. The findings of this study facilitate the identification of nesting beaches which may be of conservation and management interest due to their thermal characteristics.

Published
2005

26. Lipid metabolism of acetate-1-C by leukocytes from dogs fed an arteriosclerosis-inducing diet.

Author

Ehrhart, L., Balachandran, R., Butkus, A., Lewis, L., and Lazzarini Robertson, A.

Abstract

Dogs were maintainedoon a control ration or on a semisynthetic diet, containing 5% cholesterol and 16% hydrogenated coconut oil, known to induce hyperlipemia and arteriosclerosis. Circulating leukocytes isolated from dogs fed the coconut oil containing diet were shown to incorporate 50% more radioactivity into lipids than control leukocytes when incubated with acetate-1-C. This increase, expressed as dpm/mg of leukocyte DNA, was not specific for any particular lipid since the distribution of radioactivity between neutral lipids and phospholipids, as well as among their subfractions, was the same regardless of the diet fed. The labeling patterns observed suggest that leukocyte fatty acid synthesis from acetate occurs predominantly, and perhaps exclusively, by the chain elongation pathway. [ABSTRACT FROM AUTHOR]

Published
1971
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27. Compartmentalization of proline pools and apparent rates of collagen and non-collagen protein synthesis in arterial smooth μscle cells in culture

Author

Opsahl, W P and Ehrhart, L A

Abstract

Rates of collagen and non-collagen protein synthesis in rabbit arterial smooth muscle cells (SMC) were determined by using the specific (radio)activity of [3H]proline in the extracellular, intracellular, and prolyl-tRNA pools. The intracellular free proline specific activity was only 25% of the extracellular value in cultures incubated for 12 h in 0.25 mM-proline. The specific activity of prolyl-tRNA was less than 10% of the extracellular specific activity. Increasing the extracellular proline concentration 10-fold (to 2.5 mM), while keeping the extracellular specific activity of proline constant, resulted in equilibration of the specific activities of intracellular and extracellular free proline, but the specific activity of prolyl-tRNA remained at less than 10% of the extracellular specific activity. Therefore, calculated rates of collagen and non-collagen protein synthesis were greatly underestimated using the intracellular or extracellular specific activity of proline. SMC were also incubated with 0.1 mM-[14C]ornithine in 0.25 nM or 2.5 mM non-labelled proline to examine synthesis de novo of proline and prolyl-tRNA from ornithine. In SMC cultures containing 0.25 mM unlabelled proline, the specific activity of intracellular ornithine was approx. 45% of the extracellular specific activity, due to the production of unlabelled ornithine. The specific activity of ornithine-derived intracellular free proline in SMC incubated with 2.5 mM-proline was significantly lower than in SMC incubated in 0.25 mM-proline, due to the influx of unlabelled proline. However, a corresponding difference in the specific activity of [14C]prolyl-tRNA between SMC in 0.25 mM- or 2.5 mM-proline was not observed. Ornithine-derived [14C]proline was incorporated into proteins in a manner different from that of exogenously added radiolabelled proline. A much higher proportion of the proline synthesized de novo was channelled into collagen synthesis relative to total protein synthesis. Together, these results show that intracellular proline pools are highly compartmentalized in arterial SMC. They also suggest that proline synthesized from ornithine may enter a prolyl-tRNA pool separate from that of proline entering from the extracellular medium.

Published
1987
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28. Graft smooth muscle cells specifically synthesize increased collagen

Author

Mesh, C.L., Majors, A., Mistele, D., Graham, L.M., and Ehrhart, L.

Abstract

Purpose: Anastomotic intimal hyperplasia is characterized by smooth muscle cell (SMC) proliferation, but its final form is predominantly extracellular matrix. The purpose of this study was to compare collagen synthesis from graft SMC to that from adjacent native arterial SMC. Methods: Thoracoabdominal bypass grafts were excised 20 weeks after implantation into canine models. SMC harvested from six anastomotic graft segments and adjacent native aorta were passaged twice, grown to near-confluence, and then assayed for collagen synthesis and total protein synthesis. In four of these sites type I @a-1 procollagen mRNA levels were measured and normalized to glyceraldehyde-3-phosphate dehydrogenase. To control for increases in collagen synthesis associated with proliferation, SMC were plated at equal densities and tritium-thymidine incorporation and DNA concentration were determined. Data (mean +/- SE) were analyzed with two-factor ANOVA for repeated measures and paired Student t test and were considered significant if p < 0.05. Results: There was no difference in thymidine incorporation and total protein synthesis between groups, but collagen synthesis (graft: 52.9 +/- 1.6 disintegrations per minute/ng DNA versus native: 42.6 +/- 1.9 dpm/ng DNA; p = 0.03) and collagen synthesis as a percentage of total protein synthesis (graft: 7.16% +/- 0.11% versus native: 5.8% +/- 0.14%; p = 0.001) increased significantly in graft SMC as compared to native SMC. Type I @a-1 procollagen mRNA levels were higher in graft SMC, but this difference was not significant. Conclusions: Graft SMC specifically produce more collagen than SMC from adjacent native artery. This change does not simply reflect increases in either total protein synthesis or proliferation and may, in part, be due to increased collagen gene expression. (J VASC SURG 1995;22:142-9.)

Published
1995
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29. Arterial response to laser operation for removal of atherosclerotic plaques

Author

Gerrity, Ross G., Loop, Floyd D., Golding, Leonard A.R., Ehrhart, L. Allen, and Argenyi, Zsolt B.

Abstract

The cellular response of normal and atherosclerotic aortic intima after exposure in vivo to a 0.9 mm diameter carbon dioxide laser was examined in hypercholesterolemic swine with light and electron microscopy to evaluate tissue damage, thrombosis, and healing. At energy levels of >5 joules, laser burns appeared as craters less than 1 mm in depth and 2 mm in diameter. Two days after the operation, craters were filled with platelet-fibrin thrombi that did not protrude above the level of adjacent endothelium. The internal elastic lamina was exposed 1 to 2 mm around the crater. This area was surrounded by a ring of densely packed leukocytes at the edge of the normal endothelium. Two weeks after the operation, the depressed crater surface was mostly reendothelialized with small, closely packed endothelial cells. The subjacent thrombus contained numerous phagocytic cells with inclusions of fibrin, erythrocytes, and membranous debris. Proliferative invaginations containing medial smooth muscle cells, mitotic figures, and collagen extended into the pit from the lateral aspects. Eight weeks after the operation, the burned area was still depressed and therefore less occlusive than adjacent lesion areas, and a fibrous cap had formed over the remaining necrotic area. The results suggest that a focused, low-energy carbon dioxide laser can be used to remove focal atherosclerotic plaques from arteries without inducing excessive thrombogenicity. Rapid healing, including reendothelialization and intimal fibrous scarring, with minimal damage to surrounding tissue, was observed.

Published
1983
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30. Collagen binding to Staphylococcus aureus

Author

Holderbaum, D, Hall, G S, and Ehrhart, L A

Abstract

Staphylococcus aureus can bind soluble collagen in a specific, saturable manner. We have previously shown that some variability exists in the degree of collagen binding between different strains of heat-killed, formaldehyde-fixed S. aureus which are commercially available as immunologic reagents. The present study demonstrates that live S. aureus of the Cowan 1 strain binds amounts of collagen per organism equivalent to those demonstrated previously in heat-killed, formaldehyde-fixed bacteria but has an affinity over 100 times greater, with Kd values of 9.7 X 10(-11) M and 4.3 X 10(-8) M for live and heat-killed organisms, respectively. Studies were also carried out with S. aureus killed by ionizing radiation, since this method of killing the organism seemed less likely to alter the binding moieties on the surface than did heat killing. Bacteria killed by exposure to gamma radiation bound collagen in a manner essentially indistinguishable from that of live organisms. Binding of collagen to irradiated cells of the Cowan 1 strain was rapid, with equilibrium reached by 30 min at 22 degrees C, and was fully reversible. The binding was not inhibited by fibronectin, fibrinogen, C1q, or immunoglobulin G, suggesting a binding site for collagen distinct from those for these proteins. Collagen binding was virtually eliminated in trypsin-treated organisms, indicating that the binding site has a protein component. Of four strains examined, Cowan 1 and S. aureus ATCC 25923 showed saturable, specific binding, while strains Woods and S4 showed a complete lack of binding. These results suggest that some strains of S. aureus contain high-affinity binding sites for collagen. While the number of binding sites per bacterium varied sixfold in the two collagen-binding strains, the apparent affinity was similar. The ability of S. aureus to bind collagen with high affinity may provide a mechanism for bacterial adhesion to host tissue and thereby play a role in the invasive characteristics of this organism.

Published
1986
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31. Collagen binding in clinical isolates of Staphylococcus aureus

Author

Holderbaum, D, Spech, T, Ehrhart, L A, Keys, T, and Hall, G S

Abstract

Collagen binding was examined in 90 strains of Staphylococcus aureus derived from patient samples. Slightly under one-half (39 of 90) of the S. aureus strains bound collagen. Collagen binding in S. aureus did not correlate with either immunoglobulin G or fibronectin binding by these organisms. Chi-square analysis of isolates obtained from patients with complicated bacteremia (bacteremia associated with deep tissue infection) compared with isolates from patients with uncomplicated bacteremia (bacteremia without other infection) showed that the former strains were significantly more likely to have collagen-binding ability. Subcloning of primary isolates from patients with bacteremia showed that all clones from individual patients were either all positive for collagen binding or all negative, suggesting a common clonal origin for this characteristic. The ability to bind collagen could not be induced in strains lacking collagen affinity by repeated subculture in media supplemented with collagen.

Published
1987
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32. Metabolic Interactions among Polyunsaturated Fatty Acids in Response to an Atherogenic Diet1

Author

Balachandran, R. and Ehrhart, L. A.

Abstract

The distribution of fatty acids in hepatic lipids of dogs fed a diet containing hydrogenated coconut oil as the only source of lipid, changed in the manner characteristic of essential fatty acid deficiency. Cholesterol supplementation of this diet accentuated these changes resulting in further increases in oleic and eicosatrienoic acids and decreases in the distribution of linoleic and arachidonic acids. Two eicosatrienoic acid isomers, 20:3 w9, derived from oleic acid and 20:3 w6, an intermediate in the biosynthesis of arachidonic acid from linoleic acid, were identified. The increase of the 20:3 w6 isomer was found, somewhat unexpectedly, to be greater than that of 20:3 w9, the isomer normally associated with EFA deficiency. The increase in 20:3 w6 was probably due in part, but not completely, to competitive inhibition by the increased concentration of 20:3 w9 on the desaturation reaction whereby 20:3 w6 is converted to arachidonic acid.

Published
1975
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33. Effects of Hyperlipoproteinemic Serum and Exogenous Proline Concentration on Collagen Synthesis by Isolated Rabbit Aortas1

Author

Holderbaum, D., Ehrhart, L. A., and McCullagh, K. G.

Abstract

Collagen synthesis was measured in segments of normal rabbit aorta, incubated in vitro, by monitoring the formation of peptidyl-14C-hydroxyproline from [U-14C]-L-proline added to the incubation medium. The effect of hyperlipoproteinemic rabbit serum on the rate of collagen synthesis was compared with the effect of normal rabbit serum. No differences in the rates of synthesis were detected between the two batches of serum, despite a 60-fold difference in serum cholesterol concentration.Increases in free proline concentration in the incubation medium resulted in changes in proline flux between medium and tissue pools of free proline, but medium proline concentration had no effect on the rate of collagen synthesis.

Published
1975
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47. Basic fibroblast growth factor in the extracellular matrix suppresses collagen synthesis and type III procollagen mRNA levels in arterial smooth muscle cell cultures.

Author

Majors A and Ehrhart LA

Subjects
Animals, Arteries cytology, Cells, Cultured, Collagen biosynthesis, Extracellular Matrix drug effects, Muscle, Smooth, Vascular cytology, Muscle, Smooth, Vascular metabolism, Polysaccharide-Lyases pharmacology, Arteries metabolism, Collagen antagonists & inhibitors, Extracellular Matrix metabolism, Fibroblast Growth Factor 2 physiology, Procollagen genetics, RNA, Messenger metabolism
Abstract

To determine the effects of an intact extracellular matrix on collagen synthesis, arterial smooth muscle cells (SMCs) were plated sparsely on a cell-free, SMC-derived matrix and examined the following day. Collagen synthesis during a 5-hour incubation by cells on the matrix was reduced to 67% of the control values obtained from cultures on plastic. Total protein synthesis was unaffected. Treatment of the matrix with heparitinase to remove basic fibroblast growth factor (bFGF) before seeding the SMCs abolished the inhibitory effect of the matrix on collagen synthesis. The inhibitory effect was also eliminated by treating the matrix with a neutralizing polyclonal antibody directed against bFGF. Collagen synthesis by SMC cultures grown in wells coated with purified bFGF was only 61% that of control cultures, whereas total protein synthesis remained unchanged. Slot-blot analysis revealed that the relative message level for alpha 1(III) procollagen was reduced in cultures grown on the preexisting matrix or on plastic precoated with bFGF, whereas the alpha 1(I) procollagen message was unaffected. These results demonstrate the ability of the extracellular matrix to modulate the synthesis of collagen by arterial SMCs and indicate that bFGF in the matrix is responsible for these effects.

Published
1993
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48. Impaired arterial collagen and elastin metabolism in experimental malignant hypertension.

Author

Chatelain RE, Ehrhart LA, DiBello PM, Dardik BN, and Ferrario CM

Subjects
Animals, Aorta, Abdominal, Aorta, Thoracic anatomy & histology, Blood Pressure, Collagen biosynthesis, DNA, Elastin biosynthesis, Hypertension, Malignant pathology, Male, Organ Size, Rats, Renin blood, Aorta metabolism, Collagen metabolism, Elastin metabolism, Hypertension, Malignant metabolism
Published
1981

49. Effects of hyperlipoproteinemic serum and exogenous proline concentration on collagen synthesis by isolated rabbit aortas.

Author

Holderbaum D, Ehrhart LA, and McCullagh KG

Subjects
Animals, Hyperlipidemias blood, Hyperlipidemias physiopathology, In Vitro Techniques, Male, Rabbits, Aorta metabolism, Collagen biosynthesis, Lipoproteins, LDL blood, Proline pharmacology
Abstract

Collagen synthesis was measured in segments of normal rabbit aorta, incubated in vitro, by monitoring the formation of peptidyl-14C-hydroxyproline from [U-14C]-L-proline added to the incubation medium. The effect of hyperlipoproteinemic rabbit serum on the rate of collagen synthesis was compared with the effect of normal rabbit serum. No differences in the rates of synthesis were detected between the two batches of serum, despite a 60-fold difference in serum cholesterol concentration. Increases in free proline concentration in the incubation medium resulted in changes in proline flux between medium and tissue pools of free proline, but medium proline concentration had no effect on the rate of collagen synthesis.

Published
1975
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50. Modulation of types I and III procollagen synthesis at various stages of arterial smooth muscle cell growth in vitro.

Author

Holderbaum D and Ehrhart LA

Subjects
Animals, Aorta, Thoracic physiology, Carbon Radioisotopes, Cells, Cultured, Collagen biosynthesis, Kinetics, Male, Proline metabolism, Protein Biosynthesis, Rabbits, Muscle, Smooth, Vascular physiology, Procollagen biosynthesis
Abstract

Collagen synthesis was monitored in cultures of rabbit arterial smooth muscle cells (SMC). Both the rate of collagen synthesis per cell and collagen synthesis as a percent of total protein synthesis were measured at specific intervals from 1 to 14 days after inoculation of smooth muscle cells. The proportions of types I and III collagen present in the conditioned incubation medium and in the cell layer were also examined. After inoculation the cells displayed population expansion typical of SMC in which growth slowed but did not cease after the cells attained confluence. Collagen synthesis rates, expressed as [14C]hydroxyproline per cell, were eight-fold higher in preconfluent cells. In these cultures collagen accounted for more than 20% of the newly synthesized, 14C-labeled protein present as trichloroacetic acid (TCA)-insoluble material in 24 h culture media. In post-confluent cultures, this percentage was reduced to about 7% of the total protein synthesized. Synthesis rates of both collagen and non-collagen protein decreased with increasing time after inoculation. However, the rate of decline of collagen synthesis was three times greater than that seen for non-collagen protein. Early cultures synthesized relatively more type I than type III procollagen. The type I to type III ratio was highest at day 3 and declined after that time to day 14. While the synthesis of both types decreased with increasing age, type I declined at a greater rate resulting in a predominance of type III procollagen secretion by older cultures. We conclude that protein synthesis in general and collagen synthesis in particular are quantitatively and qualitatively dependent upon the growth stage of SMC in vitro.

Published
1984
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