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3. Conceptual comparison of constructs as first step in data harmonization: Parental sensitivity, child temperament, and social support as illustrations

Author

Verhage, M, Schuengel, C, Holopainen, A, Bakermans-Kranenburg, M, Bernier, A, Brown, G, Madigan, S, Roisman, G, Vaever, M, Wong, M, Barone, L, Behrens, K, Behringer, J, Bovenschen, I, Cassibba, R, Cassidy, J, Coppola, G, Costantini, A, Dozier, M, Ensink, K, Fearon, R, Finger, B, Hautamaki, A, Hazen, N, Ierardi, E, Jongenelen, I, Koppe, S, Lionetti, F, Mangelsdorf, S, Oosterman, M, Pace, C, Raby, K, Riva Crugnola, C, Simonelli, A, Spangler, G, Tarabulsy, G, Arnott, B, Bailey, H, Brice, P, Brisch, K, Castoro, G, Costantino, E, Cyr, C, George, C, Gloger-Tippelt, G, Gojman, S, Harder, S, Howes, C, Jacobsen, H, Jacobvitz, D, Jin, M, Juffer, F, Kazui, M, Leerkes, E, Lyons-Ruth, K, Mcmahon, C, Meins, E, Millan, S, Murray, L, Nowacki, K, Pederson, D, Priddis, L, Sagi-Schwartz, A, Schoppe-Sullivan, S, Solomon, J, Speranza, A, Steele, M, Steele, H, Teti, D, van IJzendoorn, M, van Londen-Barentsen, W, Ward, M, Verhage M. L., Schuengel C., Holopainen A., Bakermans-Kranenburg M. J., Bernier A., Brown G. L., Madigan S., Roisman G. I., Vaever M. S., Wong M. S., Barone L., Behrens K. Y., Behringer J., Bovenschen I., Cassibba R., Cassidy J., Coppola G., Costantini A., Dozier M., Ensink K., Fearon R. M. P., Finger B., Hautamaki A., Hazen N. L., Ierardi E., Jongenelen I., Koppe S., Lionetti F., Mangelsdorf S., Oosterman M., Pace C. S., Raby K. L., Riva Crugnola C., Simonelli A., Spangler G., Tarabulsy G. M., Arnott B., Bailey H., Brice P. J., Brisch K. -H., Castoro G., Costantino E., Cyr C., George C., Gloger-Tippelt G., Gojman S., Harder S., Howes C., Jacobsen H., Jacobvitz D., Jin M. K., Juffer F., Kazui M., Leerkes E. M., Lyons-Ruth K., McMahon C., Meins E., Millan S., Murray L., Nowacki K., Pederson D. R., Priddis L., Sagi-Schwartz A., Schoppe-Sullivan S. J., Solomon J., Speranza A. M., Steele M., Steele H., Teti D. M., van IJzendoorn M. H., van Londen-Barentsen W. M., Ward M. J., Verhage, M, Schuengel, C, Holopainen, A, Bakermans-Kranenburg, M, Bernier, A, Brown, G, Madigan, S, Roisman, G, Vaever, M, Wong, M, Barone, L, Behrens, K, Behringer, J, Bovenschen, I, Cassibba, R, Cassidy, J, Coppola, G, Costantini, A, Dozier, M, Ensink, K, Fearon, R, Finger, B, Hautamaki, A, Hazen, N, Ierardi, E, Jongenelen, I, Koppe, S, Lionetti, F, Mangelsdorf, S, Oosterman, M, Pace, C, Raby, K, Riva Crugnola, C, Simonelli, A, Spangler, G, Tarabulsy, G, Arnott, B, Bailey, H, Brice, P, Brisch, K, Castoro, G, Costantino, E, Cyr, C, George, C, Gloger-Tippelt, G, Gojman, S, Harder, S, Howes, C, Jacobsen, H, Jacobvitz, D, Jin, M, Juffer, F, Kazui, M, Leerkes, E, Lyons-Ruth, K, Mcmahon, C, Meins, E, Millan, S, Murray, L, Nowacki, K, Pederson, D, Priddis, L, Sagi-Schwartz, A, Schoppe-Sullivan, S, Solomon, J, Speranza, A, Steele, M, Steele, H, Teti, D, van IJzendoorn, M, van Londen-Barentsen, W, Ward, M, Verhage M. L., Schuengel C., Holopainen A., Bakermans-Kranenburg M. J., Bernier A., Brown G. L., Madigan S., Roisman G. I., Vaever M. S., Wong M. S., Barone L., Behrens K. Y., Behringer J., Bovenschen I., Cassibba R., Cassidy J., Coppola G., Costantini A., Dozier M., Ensink K., Fearon R. M. P., Finger B., Hautamaki A., Hazen N. L., Ierardi E., Jongenelen I., Koppe S., Lionetti F., Mangelsdorf S., Oosterman M., Pace C. S., Raby K. L., Riva Crugnola C., Simonelli A., Spangler G., Tarabulsy G. M., Arnott B., Bailey H., Brice P. J., Brisch K. -H., Castoro G., Costantino E., Cyr C., George C., Gloger-Tippelt G., Gojman S., Harder S., Howes C., Jacobsen H., Jacobvitz D., Jin M. K., Juffer F., Kazui M., Leerkes E. M., Lyons-Ruth K., McMahon C., Meins E., Millan S., Murray L., Nowacki K., Pederson D. R., Priddis L., Sagi-Schwartz A., Schoppe-Sullivan S. J., Solomon J., Speranza A. M., Steele M., Steele H., Teti D. M., van IJzendoorn M. H., van Londen-Barentsen W. M., and Ward M. J.

Abstract

This article presents a strategy for the initial step of data harmonization in Individual Participant Data syntheses, i.e., making decisions as to which measures operationalize the constructs of interest - and which do not. This step is vital in the process of data harmonization, because a study can only be as good as its measures. If the construct validity of the measures is in question, study results are questionable as well. Our proposed strategy for data harmonization consists of three steps. First, a unitary construct is defined based on the existing literature, preferably on the theoretical framework surrounding the construct. Second, the various instruments used to measure the construct are evaluated as operationalizations of this construct, and retained or excluded based on this evaluation. Third, the scores of the included measures are recoded on the same metric. We illustrate the use of this method with three example constructs focal to the Collaboration on Attachment Transmission Synthesis (CATS) study: parental sensitivity, child temperament, and social support. This process description may aid researchers in their data pooling studies, filling a gap in the literature on the first step of data harmonization. • Data harmonization in studies using combined datasets is of vital importance for the validity of the study results. • We have developed and illustrated a strategy on how to define a unitary construct and evaluate whether instruments are operationalizations of this construct as the initial step in the harmonization process. • This strategy is a transferable and reproducible method to apply to the data harmonization process.

Published
2022

4. Corrigendum to ‘An international genome-wide meta-analysis of primary biliary cholangitis: Novel risk loci and candidate drugs’ [J Hepatol 2021;75(3):572–581] (Journal of Hepatology (2021) 75(3) (572–581), (S0168827821003342), (10.1016/j.jhep.2021.04.055))

Author

Cordell H. J., Cordell, H, Fryett, J, Ueno, K, Darlay, R, Aiba, Y, Hitomi, Y, Kawashima, M, Nishida, N, Khor, S, Gervais, O, Kawai, Y, Nagasaki, M, Tokunaga, K, Tang, R, Shi, Y, Li, Z, Juran, B, Atkinson, E, Gerussi, A, Carbone, M, Asselta, R, Cheung, A, de Andrade, M, Baras, A, Horowitz, J, Ferreira, M, Sun, D, Jones, D, Flack, S, Spicer, A, Mulcahy, V, Byun, J, Han, Y, Sandford, R, Lazaridis, K, Amos, C, Hirschfield, G, Seldin, M, Invernizzi, P, Siminovitch, K, Ma, X, Nakamura, M, Mells, G, Mason, A, Vincent, C, Xie, G, Zhang, J, Affronti, A, Almasio, P, Alvaro, D, Andreone, P, Andriulli, A, Azzaroli, F, Battezzati, P, Benedetti, A, Bragazzi, M, Brunetto, M, Bruno, S, Calvaruso, V, Cardinale, V, Casella, G, Cazzagon, N, Ciaccio, A, Coco, B, Colli, A, Colloredo, G, Colombo, M, Colombo, S, Cristoferi, L, Cursaro, C, Croce, L, Crosignani, A, D'Amato, D, Donato, F, Elia, G, Fabris, L, Fagiuoli, S, Ferrari, C, Floreani, A, Galli, A, Giannini, E, Grattagliano, I, Lampertico, P, Lleo, A, Malinverno, F, Mancuso, C, Marra, F, Marzioni, M, Massironi, S, Mattalia, A, Miele, L, Milani, C, Morini, L, Morisco, F, Muratori, L, Muratori, P, Niro, G, O'Donnell, S, Picciotto, A, Portincasa, P, Rigamonti, C, Ronca, V, Rosina, F, Spinzi, G, Strazzabosco, M, Tiribelli, C, Toniutto, P, Valenti, L, Vinci, M, Zuin, M, Nakamura, H, Abiru, S, Nagaoka, S, Komori, A, Yatsuhashi, H, Ishibashi, H, Ito, M, Migita, K, Ohira, H, Katsushima, S, Naganuma, A, Sugi, K, Komatsu, T, Mannami, T, Matsushita, K, Yoshizawa, K, Makita, F, Nikami, T, Nishimura, H, Kouno, H, Ota, H, Komura, T, Nakamura, Y, Shimada, M, Hirashima, N, Komeda, T, Ario, K, Nakamuta, M, Yamashita, T, Furuta, K, Kikuchi, M, Naeshiro, N, Takahashi, H, Mano, Y, Tsunematsu, S, Yabuuchi, I, Shimada, Y, Yamauchi, K, Sugimoto, R, Sakai, H, Mita, E, Koda, M, Tsuruta, S, Kamitsukasa, H, Sato, T, Masaki, N, Kobata, T, Fukushima, N, Ohara, Y, Muro, T, Takesaki, E, Takaki, H, Yamamoto, T, Kato, M, Nagaoki, Y, Hayashi, S, Ishida, J, Watanabe, Y, Kobayashi, M, Koga, M, Saoshiro, T, Yagura, M, Hirata, K, Tanaka, A, Takikawa, H, Zeniya, M, Abe, M, Onji, M, Kaneko, S, Honda, M, Arai, K, Arinaga-Hino, T, Hashimoto, E, Taniai, M, Umemura, T, Joshita, S, Nakao, K, Ichikawa, T, Shibata, H, Yamagiwa, S, Seike, M, Honda, K, Sakisaka, S, Takeyama, Y, Harada, M, Senju, M, Yokosuka, O, Kanda, T, Ueno, Y, Kikuchi, K, Ebinuma, H, Himoto, T, Yasunami, M, Murata, K, Mizokami, M, Kawata, K, Shimoda, S, Miyake, Y, Takaki, A, Yamamoto, K, Hirano, K, Ichida, T, Ido, A, Tsubouchi, H, Chayama, K, Harada, K, Nakanuma, Y, Maehara, Y, Taketomi, A, Shirabe, K, Soejima, Y, Mori, A, Yagi, S, Uemoto, S, H, E, Tanaka, T, Yamashiki, N, Tamura, S, Sugawara, Y, Kokudo, N, Chalasani, N, Luketic, V, Odin, J, Chopra, K, Abecasis, G, Cantor, M, Coppola, G, Economides, A, Lotta, L, Overton, J, Reid, J, Shuldiner, A, Beechert, C, Forsythe, C, Fuller, E, Gu, Z, Lattari, M, Lopez, A, Schleicher, T, Padilla, M, Toledo, K, Widom, L, Wolf, S, Pradhan, M, Manoochehri, K, Ulloa, R, Bai, X, Balasubramanian, S, Barnard, L, Blumenfeld, A, Eom, G, Habegger, L, Hawes, A, Khalid, S, Maxwell, E, Salerno, W, Staples, J, Jones, M, Mitnaul, L, Sturgess, R, Healey, C, Yeoman, A, Gunasekera, A, Kooner, P, Kapur, K, Sathyanarayana, V, Kallis, Y, Subhani, J, Harvey, R, Mccorry, R, Rooney, P, Ramanaden, D, Evans, R, Mathialahan, T, Gasem, J, Shorrock, C, Bhalme, M, Southern, P, Tibble, J, Gorard, D, Jones, S, Srivastava, B, Foxton, M, Collins, C, Elphick, D, Karmo, M, Porras-Perez, F, Mendall, M, Yapp, T, Patel, M, Ede, R, Sayer, J, Jupp, J, Fisher, N, Carter, M, Koss, K, Shah, J, Piotrowicz, A, Scott, G, Grimley, C, Gooding, I, Williams, S, Tidbury, J, Lim, G, Cheent, K, Levi, S, Mansour, D, Beckley, M, Hollywood, C, Wong, T, Marley, R, Ramage, J, Gordon, H, Ridpath, J, Ngatchu, T, Bob Grover, V, Shidrawi, R, Abouda, G, Corless, L, Narain, M, Rees, I, Brown, A, Taylor-Robinson, S, Wilkins, J, Grellier, L, Banim, P, Das, D, Heneghan, M, Curtis, H, Matthews, H, Mohammed, F, Aldersley, M, Srirajaskanthan, R, Walker, G, Mcnair, A, Sharif, A, Sen, S, Bird, G, Prince, M, Prasad, G, Kitchen, P, Barnardo, A, Oza, C, Sivaramakrishnan, N, Gupta, P, Shah, A, Evans, C, Saha, S, Pollock, K, Bramley, P, Mukhopadhya, A, Barclay, S, Mcdonald, N, Bathgate, A, Palmer, K, Dillon, J, Rushbrook, S, Przemioslo, R, Mcdonald, C, Millar, A, Tai, C, Mitchell, S, Metcalf, J, Shaukat, S, Ninkovic, M, Shmueli, U, Davis, A, Naqvi, A, Lee, T, Ryder, S, Collier, J, Klass, H, Cramp, M, Sharer, N, Aspinall, R, Ghosh, D, Douds, A, Booth, J, Williams, E, Hussaini, H, Christie, J, Mann, S, Thorburn, D, Marshall, A, Patanwala, I, Ala, A, Maltby, J, Matthew, R, Corbett, C, Vyas, S, Singhal, S, Gleeson, D, Misra, S, Butterworth, J, George, K, Harding, T, Douglass, A, Mitchison, H, Panter, S, Shearman, J, Bray, G, Roberts, M, Butcher, G, Forton, D, Mahmood, Z, Cowan, M, Ch'Ng, C, Rahman, M, Whatley, G, Wesley, E, Mandal, A, Jain, S, Pereira, S, Wright, M, Trivedi, P, Gordon, F, Unitt, E, Palejwala, A, Austin, A, Vemala, V, Grant, A, Higham, A, Brind, A, Mathew, R, Cox, M, Ramakrishnan, S, King, A, Whalley, S, Fraser, J, Thomson, S, Bell, A, Wong, V, Kia, R, Gee, I, Keld, R, Ransford, R, Gotto, J, Millson, C, Tarocchi, M, Cordell H. J., Fryett J. J., Ueno K., Darlay R., Aiba Y., Hitomi Y., Kawashima M., Nishida N., Khor S. -S., Gervais O., Kawai Y., Nagasaki M., Tokunaga K., Tang R., Shi Y., Li Z., Juran B. D., Atkinson E. J., Gerussi A., Carbone M., Asselta R., Cheung A., de Andrade M., Baras A., Horowitz J., Ferreira M. A. R., Sun D., Jones D. E., Flack S., Spicer A., Mulcahy V. L., Byun J., Han Y., Sandford R. N., Lazaridis K. N., Amos C. I., Hirschfield G. M., Seldin M. F., Invernizzi P., Siminovitch K. A., Ma X., Nakamura M., Mells G. F., Mason A., Vincent C., Xie G., Zhang J., Affronti A., Almasio P. L., Alvaro D., Andreone P., Andriulli A., Azzaroli F., Battezzati P. M., Benedetti A., Bragazzi M. C., Brunetto M., Bruno S., Calvaruso V., Cardinale V., Casella G., Cazzagon N., Ciaccio A., Coco B., Colli A., Colloredo G., Colombo M., Colombo S., Cristoferi L., Cursaro C., Croce L. S., Crosignani A., D'Amato D., Donato F., Elia G., Fabris L., Fagiuoli S., Ferrari C., Floreani A., Galli A., Giannini E., Grattagliano I., Lampertico P., Lleo A., Malinverno F., Mancuso C., Marra F., Marzioni M., Massironi S., Mattalia A., Miele L., Milani C., Morini L., Morisco F., Muratori L., Muratori P., Niro G. A., O'Donnell S., Picciotto A., Portincasa P., Rigamonti C., Ronca V., Rosina F., Spinzi G., Strazzabosco M., Tiribelli C., Toniutto P., Valenti L., Vinci M., Zuin M., Nakamura H., Abiru S., Nagaoka S., Komori A., Yatsuhashi H., Ishibashi H., Ito M., Migita K., Ohira H., Katsushima S., Naganuma A., Sugi K., Komatsu T., Mannami T., Matsushita K., Yoshizawa K., Makita F., Nikami T., Nishimura H., Kouno H., Ota H., Komura T., Nakamura Y., Shimada M., Hirashima N., Komeda T., Ario K., Nakamuta M., Yamashita T., Furuta K., Kikuchi M., Naeshiro N., Takahashi H., Mano Y., Tsunematsu S., Yabuuchi I., Shimada Y., Yamauchi K., Sugimoto R., Sakai H., Mita E., Koda M., Tsuruta S., Kamitsukasa H., Sato T., Masaki N., Kobata T., Fukushima N., Ohara Y., Muro T., Takesaki E., Takaki H., Yamamoto T., Kato M., Nagaoki Y., Hayashi S., Ishida J., Watanabe Y., Kobayashi M., Koga M., Saoshiro T., Yagura M., Hirata K., Tanaka A., Takikawa H., Zeniya M., Abe M., Onji M., Kaneko S., Honda M., Arai K., Arinaga-Hino T., Hashimoto E., Taniai M., Umemura T., Joshita S., Nakao K., Ichikawa T., Shibata H., Yamagiwa S., Seike M., Honda K., Sakisaka S., Takeyama Y., Harada M., Senju M., Yokosuka O., Kanda T., Ueno Y., Kikuchi K., Ebinuma H., Himoto T., Yasunami M., Murata K., Mizokami M., Kawata K., Shimoda S., Miyake Y., Takaki A., Yamamoto K., Hirano K., Ichida T., Ido A., Tsubouchi H., Chayama K., Harada K., Nakanuma Y., Maehara Y., Taketomi A., Shirabe K., Soejima Y., Mori A., Yagi S., Uemoto S., H E., Tanaka T., Yamashiki N., Tamura S., Sugawara Y., Kokudo N., Chalasani N., Luketic V., Odin J., Chopra K., Abecasis G., Cantor M., Coppola G., Economides A., Lotta L. A., Overton J. D., Reid J. G., Shuldiner A., Beechert C., Forsythe C., Fuller E. D., Gu Z., Lattari M., Lopez A., Schleicher T. D., Padilla M. S., Toledo K., Widom L., Wolf S. E., Pradhan M., Manoochehri K., Ulloa R. H., Bai X., Balasubramanian S., Barnard L., Blumenfeld A., Eom G., Habegger L., Hawes A., Khalid S., Maxwell E. K., Salerno W., Staples J. C., Jones M. B., Mitnaul L. J., Sturgess R., Healey C., Yeoman A., Gunasekera A. V. J., Kooner P., Kapur K., Sathyanarayana V., Kallis Y., Subhani J., Harvey R., McCorry R., Rooney P., Ramanaden D., Evans R., Mathialahan T., Gasem J., Shorrock C., Bhalme M., Southern P., Tibble J. A., Gorard D. A., Jones S., Mells G., Mulcahy V., Srivastava B., Foxton M. R., Collins C. E., Elphick D., Karmo M., Porras-Perez F., Mendall M., Yapp T., Patel M., Ede R., Sayer J., Jupp J., Fisher N., Carter M. J., Koss K., Shah J., Piotrowicz A., Scott G., Grimley C., Gooding I. R., Williams S., Tidbury J., Lim G., Cheent K., Levi S., Mansour D., Beckley M., Hollywood C., Wong T., Marley R., Ramage J., Gordon H. M., Ridpath J., Ngatchu T., Bob Grover V. P., Shidrawi R. G., Abouda G., Corless L., Narain M., Rees I., Brown A., Taylor-Robinson S., Wilkins J., Grellier L., Banim P., Das D., Heneghan M. A., Curtis H., Matthews H. C., Mohammed F., Aldersley M., Srirajaskanthan R., Walker G., McNair A., Sharif A., Sen S., Bird G., Prince M. I., Prasad G., Kitchen P., Barnardo A., Oza C., Sivaramakrishnan N. N., Gupta P., Shah A., Evans C. D. J., Saha S., Pollock K., Bramley P., Mukhopadhya A., Barclay S. T., McDonald N., Bathgate A. J., Palmer K., Dillon J. F., Rushbrook S. M., Przemioslo R., McDonald C., Millar A., Tai C., Mitchell S., Metcalf J., Shaukat S., Ninkovic M., Shmueli U., Davis A., Naqvi A., Lee T. J. W., Ryder S., Collier J., Klass H., Cramp M. E., Sharer N., Aspinall R., Ghosh D., Douds A. C., Booth J., Williams E., Hussaini H., Christie J., Mann S., Thorburn D., Marshall A., Patanwala I., Ala A., Maltby J., Matthew R., Corbett C., Vyas S., Singhal S., Gleeson D., Misra S., Butterworth J., George K., Harding T., Douglass A., Mitchison H., Panter S., Shearman J., Bray G., Roberts M., Butcher G., Forton D., Mahmood Z., Cowan M., Ch'ng C. L., Rahman M., Whatley G. C. A., Wesley E., Mandal A., Jain S., Pereira S. P., Wright M., Trivedi P., Gordon F. H., Unitt E., Palejwala A., Austin A., Vemala V., Grant A., Higham A. D., Brind A., Mathew R., Cox M., Ramakrishnan S., King A., Whalley S., Fraser J., Thomson S. J., Bell A., Wong V. S., Kia R., Gee I., Keld R., Ransford R., Gotto J., Millson C., Tarocchi M., Cordell H. J., Cordell, H, Fryett, J, Ueno, K, Darlay, R, Aiba, Y, Hitomi, Y, Kawashima, M, Nishida, N, Khor, S, Gervais, O, Kawai, Y, Nagasaki, M, Tokunaga, K, Tang, R, Shi, Y, Li, Z, Juran, B, Atkinson, E, Gerussi, A, Carbone, M, Asselta, R, Cheung, A, de Andrade, M, Baras, A, Horowitz, J, Ferreira, M, Sun, D, Jones, D, Flack, S, Spicer, A, Mulcahy, V, Byun, J, Han, Y, Sandford, R, Lazaridis, K, Amos, C, Hirschfield, G, Seldin, M, Invernizzi, P, Siminovitch, K, Ma, X, Nakamura, M, Mells, G, Mason, A, Vincent, C, Xie, G, Zhang, J, Affronti, A, Almasio, P, Alvaro, D, Andreone, P, Andriulli, A, Azzaroli, F, Battezzati, P, Benedetti, A, Bragazzi, M, Brunetto, M, Bruno, S, Calvaruso, V, Cardinale, V, Casella, G, Cazzagon, N, Ciaccio, A, Coco, B, Colli, A, Colloredo, G, Colombo, M, Colombo, S, Cristoferi, L, Cursaro, C, Croce, L, Crosignani, A, D'Amato, D, Donato, F, Elia, G, Fabris, L, Fagiuoli, S, Ferrari, C, Floreani, A, Galli, A, Giannini, E, Grattagliano, I, Lampertico, P, Lleo, A, Malinverno, F, Mancuso, C, Marra, F, Marzioni, M, Massironi, S, Mattalia, A, Miele, L, Milani, C, Morini, L, Morisco, F, Muratori, L, Muratori, P, Niro, G, O'Donnell, S, Picciotto, A, Portincasa, P, Rigamonti, C, Ronca, V, Rosina, F, Spinzi, G, Strazzabosco, M, Tiribelli, C, Toniutto, P, Valenti, L, Vinci, M, Zuin, M, Nakamura, H, Abiru, S, Nagaoka, S, Komori, A, Yatsuhashi, H, Ishibashi, H, Ito, M, Migita, K, Ohira, H, Katsushima, S, Naganuma, A, Sugi, K, Komatsu, T, Mannami, T, Matsushita, K, Yoshizawa, K, Makita, F, Nikami, T, Nishimura, H, Kouno, H, Ota, H, Komura, T, Nakamura, Y, Shimada, M, Hirashima, N, Komeda, T, Ario, K, Nakamuta, M, Yamashita, T, Furuta, K, Kikuchi, M, Naeshiro, N, Takahashi, H, Mano, Y, Tsunematsu, S, Yabuuchi, I, Shimada, Y, Yamauchi, K, Sugimoto, R, Sakai, H, Mita, E, Koda, M, Tsuruta, S, Kamitsukasa, H, Sato, T, Masaki, N, Kobata, T, Fukushima, N, Ohara, Y, Muro, T, Takesaki, E, Takaki, H, Yamamoto, T, Kato, M, Nagaoki, Y, Hayashi, S, Ishida, J, Watanabe, Y, Kobayashi, M, Koga, M, Saoshiro, T, Yagura, M, Hirata, K, Tanaka, A, Takikawa, H, Zeniya, M, Abe, M, Onji, M, Kaneko, S, Honda, M, Arai, K, Arinaga-Hino, T, Hashimoto, E, Taniai, M, Umemura, T, Joshita, S, Nakao, K, Ichikawa, T, Shibata, H, Yamagiwa, S, Seike, M, Honda, K, Sakisaka, S, Takeyama, Y, Harada, M, Senju, M, Yokosuka, O, Kanda, T, Ueno, Y, Kikuchi, K, Ebinuma, H, Himoto, T, Yasunami, M, Murata, K, Mizokami, M, Kawata, K, Shimoda, S, Miyake, Y, Takaki, A, Yamamoto, K, Hirano, K, Ichida, T, Ido, A, Tsubouchi, H, Chayama, K, Harada, K, Nakanuma, Y, Maehara, Y, Taketomi, A, Shirabe, K, Soejima, Y, Mori, A, Yagi, S, Uemoto, S, H, E, Tanaka, T, Yamashiki, N, Tamura, S, Sugawara, Y, Kokudo, N, Chalasani, N, Luketic, V, Odin, J, Chopra, K, Abecasis, G, Cantor, M, Coppola, G, Economides, A, Lotta, L, Overton, J, Reid, J, Shuldiner, A, Beechert, C, Forsythe, C, Fuller, E, Gu, Z, Lattari, M, Lopez, A, Schleicher, T, Padilla, M, Toledo, K, Widom, L, Wolf, S, Pradhan, M, Manoochehri, K, Ulloa, R, Bai, X, Balasubramanian, S, Barnard, L, Blumenfeld, A, Eom, G, Habegger, L, Hawes, A, Khalid, S, Maxwell, E, Salerno, W, Staples, J, Jones, M, Mitnaul, L, Sturgess, R, Healey, C, Yeoman, A, Gunasekera, A, Kooner, P, Kapur, K, Sathyanarayana, V, Kallis, Y, Subhani, J, Harvey, R, Mccorry, R, Rooney, P, Ramanaden, D, Evans, R, Mathialahan, T, Gasem, J, Shorrock, C, Bhalme, M, Southern, P, Tibble, J, Gorard, D, Jones, S, Srivastava, B, Foxton, M, Collins, C, Elphick, D, Karmo, M, Porras-Perez, F, Mendall, M, Yapp, T, Patel, M, Ede, R, Sayer, J, Jupp, J, Fisher, N, Carter, M, Koss, K, Shah, J, Piotrowicz, A, Scott, G, Grimley, C, Gooding, I, Williams, S, Tidbury, J, Lim, G, Cheent, K, Levi, S, Mansour, D, Beckley, M, Hollywood, C, Wong, T, Marley, R, Ramage, J, Gordon, H, Ridpath, J, Ngatchu, T, Bob Grover, V, Shidrawi, R, Abouda, G, Corless, L, Narain, M, Rees, I, Brown, A, Taylor-Robinson, S, Wilkins, J, Grellier, L, Banim, P, Das, D, Heneghan, M, Curtis, H, Matthews, H, Mohammed, F, Aldersley, M, Srirajaskanthan, R, Walker, G, Mcnair, A, Sharif, A, Sen, S, Bird, G, Prince, M, Prasad, G, Kitchen, P, Barnardo, A, Oza, C, Sivaramakrishnan, N, Gupta, P, Shah, A, Evans, C, Saha, S, Pollock, K, Bramley, P, Mukhopadhya, A, Barclay, S, Mcdonald, N, Bathgate, A, Palmer, K, Dillon, J, Rushbrook, S, Przemioslo, R, Mcdonald, C, Millar, A, Tai, C, Mitchell, S, Metcalf, J, Shaukat, S, Ninkovic, M, Shmueli, U, Davis, A, Naqvi, A, Lee, T, Ryder, S, Collier, J, Klass, H, Cramp, M, Sharer, N, Aspinall, R, Ghosh, D, Douds, A, Booth, J, Williams, E, Hussaini, H, Christie, J, Mann, S, Thorburn, D, Marshall, A, Patanwala, I, Ala, A, Maltby, J, Matthew, R, Corbett, C, Vyas, S, Singhal, S, Gleeson, D, Misra, S, Butterworth, J, George, K, Harding, T, Douglass, A, Mitchison, H, Panter, S, Shearman, J, Bray, G, Roberts, M, Butcher, G, Forton, D, Mahmood, Z, Cowan, M, Ch'Ng, C, Rahman, M, Whatley, G, Wesley, E, Mandal, A, Jain, S, Pereira, S, Wright, M, Trivedi, P, Gordon, F, Unitt, E, Palejwala, A, Austin, A, Vemala, V, Grant, A, Higham, A, Brind, A, Mathew, R, Cox, M, Ramakrishnan, S, King, A, Whalley, S, Fraser, J, Thomson, S, Bell, A, Wong, V, Kia, R, Gee, I, Keld, R, Ransford, R, Gotto, J, Millson, C, Tarocchi, M, Cordell H. J., Fryett J. J., Ueno K., Darlay R., Aiba Y., Hitomi Y., Kawashima M., Nishida N., Khor S. -S., Gervais O., Kawai Y., Nagasaki M., Tokunaga K., Tang R., Shi Y., Li Z., Juran B. D., Atkinson E. J., Gerussi A., Carbone M., Asselta R., Cheung A., de Andrade M., Baras A., Horowitz J., Ferreira M. A. R., Sun D., Jones D. E., Flack S., Spicer A., Mulcahy V. L., Byun J., Han Y., Sandford R. N., Lazaridis K. N., Amos C. I., Hirschfield G. M., Seldin M. F., Invernizzi P., Siminovitch K. A., Ma X., Nakamura M., Mells G. F., Mason A., Vincent C., Xie G., Zhang J., Affronti A., Almasio P. L., Alvaro D., Andreone P., Andriulli A., Azzaroli F., Battezzati P. M., Benedetti A., Bragazzi M. C., Brunetto M., Bruno S., Calvaruso V., Cardinale V., Casella G., Cazzagon N., Ciaccio A., Coco B., Colli A., Colloredo G., Colombo M., Colombo S., Cristoferi L., Cursaro C., Croce L. S., Crosignani A., D'Amato D., Donato F., Elia G., Fabris L., Fagiuoli S., Ferrari C., Floreani A., Galli A., Giannini E., Grattagliano I., Lampertico P., Lleo A., Malinverno F., Mancuso C., Marra F., Marzioni M., Massironi S., Mattalia A., Miele L., Milani C., Morini L., Morisco F., Muratori L., Muratori P., Niro G. A., O'Donnell S., Picciotto A., Portincasa P., Rigamonti C., Ronca V., Rosina F., Spinzi G., Strazzabosco M., Tiribelli C., Toniutto P., Valenti L., Vinci M., Zuin M., Nakamura H., Abiru S., Nagaoka S., Komori A., Yatsuhashi H., Ishibashi H., Ito M., Migita K., Ohira H., Katsushima S., Naganuma A., Sugi K., Komatsu T., Mannami T., Matsushita K., Yoshizawa K., Makita F., Nikami T., Nishimura H., Kouno H., Ota H., Komura T., Nakamura Y., Shimada M., Hirashima N., Komeda T., Ario K., Nakamuta M., Yamashita T., Furuta K., Kikuchi M., Naeshiro N., Takahashi H., Mano Y., Tsunematsu S., Yabuuchi I., Shimada Y., Yamauchi K., Sugimoto R., Sakai H., Mita E., Koda M., Tsuruta S., Kamitsukasa H., Sato T., Masaki N., Kobata T., Fukushima N., Ohara Y., Muro T., Takesaki E., Takaki H., Yamamoto T., Kato M., Nagaoki Y., Hayashi S., Ishida J., Watanabe Y., Kobayashi M., Koga M., Saoshiro T., Yagura M., Hirata K., Tanaka A., Takikawa H., Zeniya M., Abe M., Onji M., Kaneko S., Honda M., Arai K., Arinaga-Hino T., Hashimoto E., Taniai M., Umemura T., Joshita S., Nakao K., Ichikawa T., Shibata H., Yamagiwa S., Seike M., Honda K., Sakisaka S., Takeyama Y., Harada M., Senju M., Yokosuka O., Kanda T., Ueno Y., Kikuchi K., Ebinuma H., Himoto T., Yasunami M., Murata K., Mizokami M., Kawata K., Shimoda S., Miyake Y., Takaki A., Yamamoto K., Hirano K., Ichida T., Ido A., Tsubouchi H., Chayama K., Harada K., Nakanuma Y., Maehara Y., Taketomi A., Shirabe K., Soejima Y., Mori A., Yagi S., Uemoto S., H E., Tanaka T., Yamashiki N., Tamura S., Sugawara Y., Kokudo N., Chalasani N., Luketic V., Odin J., Chopra K., Abecasis G., Cantor M., Coppola G., Economides A., Lotta L. A., Overton J. D., Reid J. G., Shuldiner A., Beechert C., Forsythe C., Fuller E. D., Gu Z., Lattari M., Lopez A., Schleicher T. D., Padilla M. S., Toledo K., Widom L., Wolf S. E., Pradhan M., Manoochehri K., Ulloa R. H., Bai X., Balasubramanian S., Barnard L., Blumenfeld A., Eom G., Habegger L., Hawes A., Khalid S., Maxwell E. K., Salerno W., Staples J. C., Jones M. B., Mitnaul L. J., Sturgess R., Healey C., Yeoman A., Gunasekera A. V. J., Kooner P., Kapur K., Sathyanarayana V., Kallis Y., Subhani J., Harvey R., McCorry R., Rooney P., Ramanaden D., Evans R., Mathialahan T., Gasem J., Shorrock C., Bhalme M., Southern P., Tibble J. A., Gorard D. A., Jones S., Mells G., Mulcahy V., Srivastava B., Foxton M. R., Collins C. E., Elphick D., Karmo M., Porras-Perez F., Mendall M., Yapp T., Patel M., Ede R., Sayer J., Jupp J., Fisher N., Carter M. J., Koss K., Shah J., Piotrowicz A., Scott G., Grimley C., Gooding I. R., Williams S., Tidbury J., Lim G., Cheent K., Levi S., Mansour D., Beckley M., Hollywood C., Wong T., Marley R., Ramage J., Gordon H. M., Ridpath J., Ngatchu T., Bob Grover V. P., Shidrawi R. G., Abouda G., Corless L., Narain M., Rees I., Brown A., Taylor-Robinson S., Wilkins J., Grellier L., Banim P., Das D., Heneghan M. A., Curtis H., Matthews H. C., Mohammed F., Aldersley M., Srirajaskanthan R., Walker G., McNair A., Sharif A., Sen S., Bird G., Prince M. I., Prasad G., Kitchen P., Barnardo A., Oza C., Sivaramakrishnan N. N., Gupta P., Shah A., Evans C. D. J., Saha S., Pollock K., Bramley P., Mukhopadhya A., Barclay S. T., McDonald N., Bathgate A. J., Palmer K., Dillon J. F., Rushbrook S. M., Przemioslo R., McDonald C., Millar A., Tai C., Mitchell S., Metcalf J., Shaukat S., Ninkovic M., Shmueli U., Davis A., Naqvi A., Lee T. J. W., Ryder S., Collier J., Klass H., Cramp M. E., Sharer N., Aspinall R., Ghosh D., Douds A. C., Booth J., Williams E., Hussaini H., Christie J., Mann S., Thorburn D., Marshall A., Patanwala I., Ala A., Maltby J., Matthew R., Corbett C., Vyas S., Singhal S., Gleeson D., Misra S., Butterworth J., George K., Harding T., Douglass A., Mitchison H., Panter S., Shearman J., Bray G., Roberts M., Butcher G., Forton D., Mahmood Z., Cowan M., Ch'ng C. L., Rahman M., Whatley G. C. A., Wesley E., Mandal A., Jain S., Pereira S. P., Wright M., Trivedi P., Gordon F. H., Unitt E., Palejwala A., Austin A., Vemala V., Grant A., Higham A. D., Brind A., Mathew R., Cox M., Ramakrishnan S., King A., Whalley S., Fraser J., Thomson S. J., Bell A., Wong V. S., Kia R., Gee I., Keld R., Ransford R., Gotto J., Millson C., and Tarocchi M.

Abstract

It has come to our attention that the name of one of the authors in our manuscript was incorrectly spelled ‘Jinyoung Byan’; the correct spelling is ‘Jinyoung Byun’ as in the author list above. In addition, the excel files of the supplementary tables were not included during the online publication of our article. These have now been made available online. We apologize for any inconvenience caused.

Published
2022

5. Effectiveness and tolerability of perampanel in children and adolescents with refractory epilepsies—An Italian observational multicenter study

Author

De Liso, P., Vigevano, F., Specchio, N., De Palma, L., Bonanni, P., Osanni, E., Coppola, G., Parisi, P., Grosso, S., Verrotti, A., Spalice, A., Nicita, F., Zamponi, N., Siliquini, S., Giordano, L., Martelli, P., Guerrini, R., Rosati, A., Ilvento, L., Belcastro, V., Striano, P., Vari, M.S., Capovilla, G., Beccaria, F., Bruni, O., Luchetti, A., Gobbi, G., Russo, A., Pruna, D., Tozzi, A.E., and Cusmai, R.

Published
2016
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7. Batch and fixed bed adsorption of methylene blue onto foamed metakaolin-based geopolymer: A preliminary investigation.

Author

Candamano, S., Coppola, G., Mazza, A., Caicho Caranqui, J.I., Bhattacharyya, S., Chakraborty, S., Alexis, F., and Algieri, C.

Subjects
*KAOLIN, *METHYLENE blue, *LANGMUIR isotherms, *ADSORPTION (Chemistry), *CHEMISORPTION, *ADSORPTION isotherms
Abstract

Synthetic dyes, represent a serious hazard for the aquatic environments and groundwater system. The removal of dyes by the adsorption process avoids the production of sludge and secondary toxic compounds and offers high efficiency and very short operational times. In the present work, cationic Methylene Blue (MB) dye was used as a model pollutant to investigate the adsorption properties of a foamed geopolymer. The adsorbent has an apparent density of 0,75 g/cm3. It is characterized by a complex system of spherical and interconnected macro-pores with a mesopore volume of 0.143 cm³ /g that favors the mass transport and a pH pzc equal to 8.2. Batch and fixed granular bed column tests were carried out. The maximum MB uptake, in batch experiments, was 40.0 mg/g. Removal efficiency was around 95% up to a MB concentration of 25 mg/L. The pseudo second order kinetic model and Langmuir isotherm model better describe MB adsorption onto geopolymer. Fixed granular bed column tests were carried out by varying the initial dye concentration at a constant flow rate and bed height. Results are better fitted by Yoon and Nelson model. The obtained results demonstrate that foamed geopolymers are good candidates for the removing MB from aqueous solutions. [Display omitted] • Foamed geopolymer has been tested as adsorbent of Methylene Blue. • The pseudo second order model better describes MB adsorption onto geopolymer. • Langmuir isotherm models shows higher accuracy in fitting experimental data. • The mechanism of MB adsorption onto geopolymer is chemisorption. • Yoon and Nelson model better fits fixed granular bed column experimental data. [ABSTRACT FROM AUTHOR]

Published
2023
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26. Numerical treatment of the energy equation in compressible flows simulations.

Author

De Michele, C. and Coppola, G.

Subjects
*FLOW simulations, *SPEED of sound, *EQUATIONS, *NAVIER-Stokes equations, *EULER equations, *COMPRESSIBLE flow, *ENTHALPY
Abstract

We analyze the conservation properties of various discretizations of the system of compressible Euler equations for shock-free flows, with special focus on the treatment of the energy equation and on the induced discrete equations for other thermodynamic quantities. The analysis is conducted both theoretically and numerically and considers two important factors characterizing the various formulations, namely the choice of the energy equation and the splitting used in the discretization of the convective terms. The energy equations analyzed are total and internal energy, total enthalpy, pressure, speed of sound and entropy. In all the cases examined the discretization of the convective terms is made with locally conservative and kinetic-energy preserving schemes. Some important relations between the various formulations are highlighted and the performances of the various schemes are assessed by considering two widely used test cases. Together with some popular formulations from the literature, also new and potentially useful ones are analyzed. • Analysis of the conservation properties of the discretizations of the compressible Euler equations. • Study of induced discrete evolution of derived thermodynamic quantities. • Assessment of the robustness with respect to energy variable and split form choice. [ABSTRACT FROM AUTHOR]

Published
2023
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27. Antiepileptic drug withdrawal in childhood epilepsy: What are the risk factors associated with seizure relapse?

Author

Verrotti, A., D’Egidio, C., Agostinelli, S., Parisi, P., Spalice, A., Chiarelli, F., and Coppola, G.

Subjects
ANTICONVULSANTS, CHILDHOOD epilepsy, DISEASE risk factors, DISEASE relapse, ELECTROENCEPHALOGRAPHY, DOSE-effect relationship in pharmacology
Abstract

Abstract: Background: In recent years, several studies have been conducted to determine the risk of relapse after antiepileptic drug (AED) withdrawal: there is no general agreement on criteria that can predict safe discontinuation or seizure recurrence. Aims: To evaluate prospectively the relapse rate of epilepsy associated to AED withdrawal in epileptic children and to determine the risk factors of seizure recurrence. Methods: One hundred-sixty-eight children with epilepsy who were seizure-free for at least 2 years were enrolled and all children were proposed to stop AED treatment and were followed. In all children electroencephalograms (EEGs) were performed before the withdrawal of AEDs and after discontinuation of the treatment. Results: A total of 48 (28.6%) children relapsed; half of these patients relapsed while reducing the AED dose and the other half after the AED was withdrawn; after 2 years without AEDs, the risk of relapse was very low. Data evaluated by multivariable analysis showed that the children receiving polytherapy before AED withdrawal, having a history of febrile seizures and suffering from multiple seizure types relapsed more frequently. The presence of abnormal post-withdrawal EEG recordings was associated with a higher risk of seizure recurrence. Conclusions: Epileptic children, after a seizure-free period of 2 years, have a low risk of seizure recurrence. The potential risk factors of relapse, are multiple seizure types previous polytherapy, history of febrile seizures and abnormalities in post-withdrawal EEG. [Copyright &y& Elsevier]

Published
2012
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28. The Val66Met Polymorphism of the BDNF Gene Influences Trigeminal Pain-Related Evoked Responses.

Author

Di Lorenzo C, Di Lorenzo G, Daverio A, Pasqualetti P, Coppola G, Giannoudas I, Barone Y, Grieco GS, Niolu C, Pascale E, Santorelli FM, Nicoletti F, Pierelli F, Siracusano A, and Seri S

Abstract

Cortical pain processing is associated with large-scale changes in neuronal connectivity, resulting from neural plasticity phenomena of which brain-derived neurotrophic factor (BDNF) is a central driver. The common single nucleotide polymorphism Val66Met is associated with reduced BDNF activity. Using the trigeminal pain-related evoked potential (tPREP) to repeated electrical painful stimuli, we investigated whether the methionine substitution at codon 66 of the BDNF gene was associated with changes in cortical processing of noxious stimuli. Fifty healthy volunteers were genotyped: 30 were Val/Val and 20 were Met-carriers. tPREPs to 30 stimuli of the right supraorbital nerve using a concentric electrode were recorded. The N2 and P2 component latencies and the N2-P2 amplitude were measured over the 30 stimuli and separately, by dividing the measurements in 3 consecutive blocks of 10 stimuli. The average response to the 30 stimuli did not differ in latency or amplitude between the 2 genotypes. There was a decrease in the N2-P2 amplitude between first and third block in the Val/Val group but not in Met-carriers. BDNF Val66Met is associated with reduced decremental response to repeated electrical stimuli, possibly as a result of ineffective mechanisms of synaptic memory and brain plasticity associated with the polymorphism. PERSPECTIVE: BDNF Val66Met polymorphism affects the tPREP N2-P2 amplitude decrement and influences cortical pain processing through neurotrophin-induced neural plasticity, or through a direct BDNF neurotransmitter-like effect. Our findings suggest that upcoming BDNF central agonists might in the future play a role in pain management. [ABSTRACT FROM AUTHOR]

Published
2012

29. First long-term experience with the orphan drug rufinamide in children with myoclonic-astatic epilepsy (Doose syndrome).

Author

von Stülpnagel, C., Coppola, G., Striano, P., Müller, A., Staudt, M., and Kluger, G.

Subjects
ORPHAN drugs, LENNOX-Gastaut syndrome, CHILDHOOD epilepsy, DRUG efficacy, DRUG tolerance, RETROSPECTIVE studies, THERAPEUTICS
Abstract

Abstract: Introduction: We evaluated the long-term efficacy and tolerability of the orphan drug rufinamide (RUF) in children with pharmacoresistant myoclonic-astatic epilepsy (MAE, Doose syndrome). Methods: This was a retrospective European multicenter study on eight patients who had started an intention-to-treat trial of RUF between July 2007 and June 2010. Clinical information was collected via questionnaire. Responder rate was defined as reduction of seizure frequency ≥50% in comparison to four weeks before starting RUF. Maximum follow-up was eighteen months. Results: Responder rates were 7/8 patients after 3 months, 6/8 patients after 6 months and 5/8 patients after 12 months. RUF seemed particularly effective in the prevention of myoclonic-astatic seizures (comparable with drop attacks in Lennox-Gastaut-Syndrome, for which RUF is particularly effective). Some loss of efficacy was noticed in the long-term observation. Side-effects occurred in two patients. Seizure aggravation was not observed. Conclusion: RUF seems to be a promising therapeutic option in children with MAE. Further studies are warranted to confirm these first observations. [Copyright &y& Elsevier]

Published
2012
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32. Experimental investigation on a turbulence generation system with high-blockage plates

Author

Coppola, G. and Gomez, A.

Subjects
*TURBULENCE, *SCIENTIFIC experimentation, *REYNOLDS number, *STRUCTURAL plates, *FLUID dynamics, *POWER spectra, *FREQUENCIES of oscillating systems
Abstract

Abstract: An experimental study was conducted to develop and characterize systematically a new turbulence generator system to yield large turbulent Reynolds numbers in a compact configuration. The effect of the geometric parameters of two families of high-blockage plates on the resulting turbulent flow field was systematically studied: one series of plates was characterized by the number and distribution of circular openings; a second series had non-circular opening(s) with different shapes, distribution and position of the opening(s). The plates were placed upstream of a contoured contraction and the near field at the centerline of the resulting turbulent free jet was characterized by hot-wire anemometry in terms of mean axial velocity, turbulence intensity, turbulence length scales and corresponding Reynolds numbers. The plate with a central, non-circular opening produced the best compromise of highest turbulence levels along with excellent uniformity in average velocity and turbulence intensity, as evidenced by scan in the transverse direction. It appears to be the most promising one. By comparison with more traditional approaches to turbulence generation, we increased the turbulent Reynolds numbers based on the integral length scale to values on the order of 1000, which was one of the design objectives. Other plate geometries also yielded intense turbulence, but, in some cases, exhibited spurious frequency peaks in their power spectrum. The turbulent generation approach is to be adapted to combustion studies to reproduce conditions typical of practical system in relatively small experimental set-ups that are well-suited for bench-top experiments. [Copyright &y& Elsevier]

Published
2009
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33. Efficacy and safety of levetiracetam in infants and young children with refractory epilepsy.

Author

Grosso, S., Cordelli, D.M., Franzoni, E., Coppola, G., Capovilla, G., Zamponi, N., Verrotti, A., Morgese, G., and Balestri, P.

Subjects
EPILEPSY, BRAIN diseases, CHILDHOOD epilepsy, PEDIATRIC neurology, FEBRILE seizures
Abstract

Summary: The aim of this multicentric, retrospective, and uncontrolled study was to evaluate the efficacy and safety of levetiracetam (LEV) in 81 children younger than 4 years with refractory epilepsy. At an average follow-up period of 9 months, LEV administration was found to be effective in 30% of patients (responders showing more than a 50% decrease in seizure frequency) of whom 10 (12%) became seizure free. This efficacy was observed for focal (46%) as well as for generalized seizures (42%). In addition, in a group of 48 patients, we compared the initial efficacy (evaluated at an average of 3 months of follow-up) and the retention at a mean of 12 months of LEV, with regard to loss of efficacy (defined as the return to the baseline seizure frequency). Twenty-two patients (46%) were initial responders. After a minimum of 12 months of follow-up, 9 of 48 patients (19%) maintained the improvement, 4 (8%) of whom remained seizure free. A loss of efficacy was observed in 13 of the initial responders (59%). Maintained LEV efficacy was noted in patients with focal epilepsy and West syndrome. LEV was well tolerated. Adverse events were seen in 18 (34%) patients. The main side effects were drowsiness and nervousness. Adverse events were either tolerable or resolved in time with dosage reduction or discontinuation of the drug. We conclude that LEV is safe and effective for a wide range of epileptic seizures and epilepsy syndromes and, therefore, represents a valid therapeutic option in infants and young children affected by epilepsy. [Copyright &y& Elsevier]

Published
2007
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34. Levetiracetam monotherapy for children and adolescents with benign rolandic seizures.

Author

Verrotti, A., Coppola, G., Manco, R., Ciambra, G., Iannetti, P., Grosso, S., Balestri, P., Franzoni, E., and Chiarelli, F.

Subjects
THERAPEUTICS, EPILEPSY, CHILDREN with epilepsy, SPASMS, DROWSINESS, IRRITABILITY (Psychology)
Abstract

Summary: To assess the efficacy, tolerability and safety of Levetiracetam (LEV) therapy, we identified 21 (15 male; 6 female) patients with a history of benign epilepsy with centrotemporal spikes (BECTS), with and without secondarily generalization in children and adolescents aged between 5.0 and 12.1 years. LEV was administered as a first drug (number of patients =9) or converted after previous treatment with other AEDs (number of patients =12). The patients were subdivided into two groups: “newly diagnosed” patients and “converted” patients. Patients were followed up for 12 months and all patients were able to continue on LEV treatment. At the end of follow-up (12 months), all patients were seizure free or showed a reduction of seizures >50%. LEV dosage ranged from 1000 to 2500mg/daily. Overall, 100% of patients completed the 12 months study, without any important side effect. Somnolence and irritability occurred in two (9.5%) patients. Our results support findings that LEV monotherapy is effective and well tolerated in children with BECTS. Prospective, large, long-term double-blind studies are needed to confirm these findings. [Copyright &y& Elsevier]

Published
2007
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35. The impact of chromosomal alteration on embryo development

Author

King, W.A., Coppola, G., Alexander, B., Mastromonaco, G., Perrault, S., Nino-Soto, M.I., Pinton, A., Joudrey, E.M., and Betts, D.H.

Subjects
*TELOMERES, *CHROMOSOMES, *CELL nuclei, *TELOMERASE
Abstract

Abstract: Chromosome alterations, such as those affecting telomere erosion, predictably occur with each cell division, others, which involve changes to the expression and replication of the X-chromosome occur at particular stages of development, while those that involve loss or gain of chromosomes occur in a random and so far unpredictable manner. The production of embryos in vitro and by somatic cell nuclear transfer (SCNT) has been associated with altered expression of marker genes on the X-chromosome and an increased incidence of chromosomally abnormal cells during early development. In the case of SCNT embryos chromosome abnormalities may be associated with the nuclear donor cell. Telomere rebuilding subsequent to SCNT appears to vary according to species and type of donor cell used. It is speculated that the rate of telomere erosion and incidence of chromosome abnormalities affects developmental potential of early embryos and may be potential predictors of developmental outcome. [Copyright &y& Elsevier]

Published
2006
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36. Efficacy and safety of levetiracetam: An add-on trial in children with refractory epilepsy.

Author

Grosso, S., Franzoni, E., Coppola, G., Iannetti, P., Verrotti, A., Cordelli, D.M., Marchiani, V., Pascotto, A., Spalice, A., Acampora, B., Morgese, G., and Balestri, P.

Subjects
EPILEPSY, BRAIN diseases, SEIZURES (Medicine), CHILDREN, PEOPLE with epilepsy, THERAPEUTICS
Abstract

Summary: The aim of this multicentric, prospective and uncontrolled study was to evaluate the efficacy and safety of levetiracetam in 110 children with refractory epilepsy, of whom 21 were less than 4 years old. After a median follow-up period of 7 months, levetiracetam administration was effective (responders with >50% decrease in seizure frequency) in 39% of children, of whom 10 (9%) became seizure-free. The efficacy was higher in patients with localization-related epilepsy (58% of responders) than in those with generalized epilepsy (37% of responders). Levetiracetam was well tolerated. The main side effects of somnolence and irritability occurred in 14% of patients. In one patient acute choreoathetosis occurred after few doses of levetiracetam. Overall, the adverse effects were not severe. Children younger than 4 years were particularly tolerant. In conclusion, the present study confirms that levetiracetam is effective and well tolerated as an add-on treatment in children with refractory epilepsy. Our preliminary data also indicate that levetiracetam may be a valid therapeutic option for epilepsy in infants and young children. [Copyright &y& Elsevier]

Published
2005
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39. 4. The degree of motor cortex excitability in migraine depends on the days elapsed since the last attack.

Author

Bracaglia, M., Coppola, G., Napoli, F., Di Lenola, D., Serrao, M., Di Lorenzo, C., and Pierelli, F.

Subjects
*MIGRAINE, *MOTOR cortex physiology, *SOMATOSENSORY evoked potentials, *NEUROPLASTICITY, *STIMULUS & response (Psychology), *PATIENTS
Abstract

Here, we investigated whether level of cortical excitability changes with the distance from the last migraine attack could explain previous inconsistent results. Twenty-six patients with untreated migraine without aura (MO) underwent MEP study between attacks and were compared to a group of 24 healthy volunteers (HV). The TMS figure-of-eight coil was positioned over the left motor area. We first identified the resting motor threshold (RMT) and then amplitude of MEP was evaluated by delivering and averaging 10 single pulses of TMS using a stimulus intensity of 120% RMT at a rate of 0.1 Hz. Mean RMTs (54.2 in MO vs. 55.8 in HV) and MEP amplitudes (3057 microV in MO vs. 3675 microV in HV) were not significantly different between MO and HV. In MO, the RMT negatively correlated with days elapsed since the last migraine attack ( r = −0.426, p = 0.03), i.e. RMT was minimal at a long time interval after an attack while it was greater and within the range of normative values approaching to an attack. The dynamic RMT variations found here resemble those we have previously reported for visual and somatosensory evoked potentials, and may represent time-dependent plastic changes in brain excitability in relation with the migraine cycle. [ABSTRACT FROM AUTHOR]

Published
2016
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40. 6. Glutamate Receptor Ionotropic AMPA 3 (GRIA3) gene polymorphism influences cortical response to somatosensory stimulation in medication-overuse headache patients.

Author

Coppola, G., Di Lorenzo, C., Grieco, G.S., Santoro, M., Santorelli, F.M., Pascale, E., and Pierelli, F.

Subjects
*HEADACHE, *SOMATOSENSORY evoked potentials, *GLUTAMATE receptors, *GENETIC polymorphisms, *MEDICATION abuse, *PATIENTS
Abstract

Glutamate-mediated pathways seem to play a relevant role in the generation of somatosensory evoked potentials (SSEPs) in supragranular parietal layers, but also in maintaining central sensitization, a mechanism that may be responsible for medication overuse headache (MOH). Here, we tested whether Glutamate Receptor Ionotropic AMPA 3 (GRIA3) rs3761555 polymorphisms may influence SSEPs sensitization and habituation in patients with MOH. We recorded median nerve SSEPs (two blocks of 100 sweeps) in 60 MOH patients. We measured N20-P25 1st block amplitude, as a marker of sensitization, and amplitude changes between two sequential blocks, as a marker of habituation. According to their genotype, patients were divided in three groups: “T/T” (N = 27), “T/C” (N = 26) and “C/C” (N = 7). No differences emerged among genotypes in terms of grand-average for all the neurophysiological measures. Patients carrying T/T polymorphism had larger-amplitude block 1 SSEP than those carrying C/C (z = 2.604; p = 0.028), with T/C falling in between. No between groups differences were observed regarding delayed habituation. In patients with MOH, GRIA3 rs3761555 polymorphisms influence SSEP sensitization and, in general, cortical excitability. These data suggest that the glutamatergic system is one of the main drivers of central sensitization in MOH patients. [ABSTRACT FROM AUTHOR]

Published
2016
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41. 73. Transcutaneous supraorbital nerve stimulation increases thalamocortical activity in migraine between attacks.

Author

Coppola, G., Di Lenola, D., Serrao, M., Di Lorenzo, C., and Pierelli, F.

Subjects
*TRANSCUTANEOUS electrical nerve stimulation, *THALAMOCORTICAL system, *MIGRAINE, *SOMATOSENSORY evoked potentials, *CLINICAL trials, *PHYSIOLOGY, *PATIENTS
Abstract

In a recent randomized double-blind sham-controlled study the Cefaly®, a novel transcutaneous supraorbital electrostimulation device, has been successfully used as a prophylactic treatment for episodic migraine. The possible mechanisms of action through which the device is able to induce clinical improvement in migraine are not known. Here, we investigated whether Cefaly® may act centrally at the thalamocortical/cortical level. We have recorded the somatosensory evoked potentials (SSEPs) before and two times after one session of supraorbital stimulation with Cefaly® lasting 20 min in 10 migraine without aura patients between attacks. We measured the N20-P25 amplitudes on the low-frequency SSEP, and, after applying a band-pass filter (450–750 Hz), maximal peak-to-peak amplitudes of the pre-synaptic, reflecting thalamocortical activity, and post-synaptic, reflecting primary cortical activation, high-frequency oscillations (HFOs). Pre-synaptic HFO amplitudes, reflecting somatosensory thalamocortical activity, significantly increased after the stimulation (from 0.035 microV to 0.058 microV, p < 0.01), whereas both the low-frequency N20 SSEP component and post-synaptic HFOs were unaffected. Present data might support the hypothesis that Cefaly® acts centrally through increased thalamocortical activity induced by the neurostimulation. It is of obvious interest to verify whether these device-induced changes might persist at long-term after 3-month daily preventive stimulation, and if they follow clinical improvement. [ABSTRACT FROM AUTHOR]

Published
2016
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42. 1. Cortical functional correlates of responsiveness to short-lasting preventive intervention with ketogenic diet in migraine: A multimodal evoked potentials study.

Author

Bracaglia, M., Coppola, G., Di Lorenzo, C., Di Lenola, Davide, Serrao, M., Parisi, V., and Pierelli, F.

Subjects
*MIGRAINE, *KETOGENIC diet, *EVOKED potentials (Electrophysiology), *HABITUATION (Neuropsychology), *STIMULUS & response (Psychology), *PATIENTS
Abstract

A ketogenic diet (KD) – a drastic restriction in carbohydrate and lipid intake promoting fat metabolism and ketone body synthesis – has a role in preventing migraine. Here, we aim to identify cortical neurophysiological correlates of responsiveness to short-lasting preventive intervention with KD in migraine. Thus, we recorded visual (VEPs) and median nerve somatosensory (SSEPs) evoked potentials in 18 interictal migraine patients before and after 1 month of KD during ketogenesis. We measured VEP N1-P1 and SSEP N20-P25 amplitudes respectively in 6 and in 2 sequential blocks of 100 sweeps as well as habituation as the slope of the linear regression between block 1 and 6 for VEPs or between 1 and 2 for SSEPs. After 1-month of KD, a significant reduction in the mean attack frequency and duration was observed (all P < 0.001). The KD did not change the 1st SSEP and VEP block of responses, but significantly induced normalization of the interictally reduced VEPs and SSEPs (all p < 0.01) habituation during the subsequent blocks. KD could restore normal EPs habituation curves during stimulus repetition without significantly changing the early amplitude responses. Thus, we hypothesize that KD acts on habituation regulating the balance between excitation and inhibition at the cortical level. [ABSTRACT FROM AUTHOR]

Published
2016
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44. 29. Impaired VEP after photostress in migraine patients between attacks.

Author

Coppola, G., Di Lenola, D., Bracaglia, M., Di Ciaccia, G., Di Lorenzo, C., Serrao, M., Parisi, V., and Pierelli, F.

Subjects
*VISUAL evoked potentials, *MIGRAINE, *PSYCHOPHYSICS, *VISION disorders, *DISEASE susceptibility, *SENSORY perception, *NEUROPHYSIOLOGY, *PATIENTS
Abstract

Subtle impaired macular vision was observed among different psychophysical experimental tasks in migraine. Here we studied visual evoked potential (VEP) after photostress (PS) representing an objective index of the dynamic properties of macular performance after exposure to intense light stimulation. We recorded VEPs in basal condition and after PS in 43 migraineurs patients (19 with and 24 without aura) and 14 healthy volunteers (HV). We compared P100 implicit time and N75-P100 amplitude of baseline VEP with those collected every 20 s up to 200 s after PS. In HV, N75-P100 amplitude significantly decreased 20 s after PS, and recovered subsequently. There was no effect in the migraine groups. In fact, the percentage reduction in N75-P100 amplitude observed at 20s after photostress in MO and MA patients were lower than in HV (MO vs HV P < 0.05, MA vs HV P < 0.05). In migraine, the percentage of amplitude change at 20 s was negatively correlated with number of days since the last migraine attack ( r = −0.525, p = 0.02). We documented altered recovery after PS under the influence of imminent attack. Whether present VEP findings are related to the ictal/interictal migraineur susceptibility to abnormal sensory perception, such as visual discomfort, remains to be determined. [ABSTRACT FROM AUTHOR]

Published
2015
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45. 69. Reduced visual cortical reactivity in migraineurs with a positive family history of migraine.

Author

Coppola, G., Bracaglia, M., Di Lenola, D., Di Ciaccia, G., Di Lorenzo, C., Serrao, M., Parisi, V., and Pierelli, F.

Subjects
*MIGRAINE, *VISUAL evoked potentials, *FAMILY history (Medicine), *GENETIC load, *HABITUATION (Neuropsychology), *NEURAL stimulation, *NEUROPHYSIOLOGY, *PATIENTS
Abstract

In migraine, the genetic load can be seen as determining, on the one hand, a critical threshold for the disease development, and on the other hand, it may be responsible for interictal nervous system dysfunction. We were aimed at verifying whether a family history of migraine might influence migraineurs’ cortical abnormal information processing. We retrospectively collected 109 migraine patients from those reviewed who had visual evoked potentials (VEPs) recordings (6 blocks of 100 sweeps, 15 min of arc cheques, 3.1 repetition rate) and information about parental history of migraine. Neurophysiological data were compared with those of 42 healthy volunteers (HV) without family history of migraine. We recruited 109 migraineurs, 85 with and 24 without a positive family history of migraine. Patients who had one parent affected (mother or father) had significantly lower N75-P100 VEP amplitude blocks overall than those had no parents affected, the latter resulting not different from HV. Lack of VEP N75-P100 amplitude habituation was found in overall migraineurs compared with HV, irrespectively of whether they had a parent affected or not. These findings suggest that familial occurrence of migraine may predispose to a general reduced cortical reactivity to visual stimulation. [ABSTRACT FROM AUTHOR]

Published
2015
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46. Pseudo-symplectic numerical schemes for Landau-Lifshitz dynamics.

Author

d'Aquino, M., Capuano, F., Coppola, G., Serpico, C., and Mayergoyz, I.D.

Subjects
*LANDAU theory, *MAGNETIZATION, *DISCRETIZATION methods, *FREE energy (Thermodynamics), *RUNGE-Kutta formulas
Abstract

Abstract Numerical techniques for the time integration of Landau-Lifshitz magnetization dynamics are considered. In the continuous model, such dynamics implies the conservation of magnetization amplitude and, when dissipation is neglected, even the conservation of free energy, a property which is generally corrupted by the time-discretization method. In this work, two classes of explicit schemes, based on Runge-Kutta and midpoint methods respectively, are introduced. The schemes are termed pseudo-symplectic in that they are accurate to order p , but preserve magnetization amplitude and free energy to order q > p. Numerical tests are performed on the simulation of fast precessional switching dynamics for which an analytical solution is available. [ABSTRACT FROM AUTHOR]

Published
2018
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47. 13. Somatosensory high-frequency oscillations in chronic migraine.

Author

Iacovelli, E., Coppola, G., Bracaglia, M., Salvia, V. La, Fragiotta, G., Lorenzo, C. Di, and Pierelli, F.

Subjects
*MIGRAINE diagnosis, *SOMATOSENSORY evoked potentials, *HIGH-frequency ventilation (Therapy), *ELECTROPHYSIOLOGY, *SENSITIZATION (Neuropsychology), *NEUROPHYSIOLOGY
Abstract

When still episodic, migraine between attacks is characterized by altered thalamo-cortical connections. Less is known about how chronic migraine changes the activity of these connections. Fifteen episodic migraineurs (MO) between attacks and 19 chronic migraine (CM) patients underwent right median-nerve somatosensory evoked potentials (500 sweeps, 4.4Hz). Patients were compared to a group of 20 healthy volunteers (HV). Digital filter (band-pass 450–750Hz) was employed to extract high-frequency oscillations (HFOs) superimposed on the conventional broad-band N20 SSEPs. Two phases of the HFOs were identified: an early, reflecting the thalamo-cortical fibers activity, and a later, probably generated by cortical pyramidal cells. In CM the reduced early HFOs amplitude found in MO between attacks disappeared, showing a pattern similar to HVs. This early HFOs normalization was accompanied by a significant shortened latency of the negative oscillatory maximum. The amplitude of the late HFOs was significantly greater in CM than in HV. Our data document that the transformation from episodic to chronic migraine is accompanied by changes in thalamo-cortical connectivity. Whether this electro-functional behavior is primary or secondary to daily headache, reflecting thus an electrophysiological fingerprint of the somatosensory system central sensitization process remains to be determined. [Copyright &y& Elsevier]

Published
2013
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48. 14. Lateral inhibition in somatosensory cortex of migraine without aura patients between attacks.

Author

Bracaglia, M., Coppola, G., Iacovelli, E., Lorenzo, C. Di, and Pierelli, F.

Subjects
*MIGRAINE diagnosis, *SOMATOSENSORY cortex, *CEREBRAL dominance, *SOMATOSENSORY evoked potentials, *NEUROPHYSIOLOGY, *HABITUATION (Neuropsychology)
Abstract

Our objective was to investigate lateral inhibition within the somatosensory cortex in a group of migraine without aura (MO) patients compared to healthy volunteers (HVs) by stimulating two peripheral nerves simultaneously, while recording somatosensory evoked potentials (SEPs). SEPs were elicited by electrical stimulation of the right median and ulnar nerve at the wrist separately and simultaneously (300 sweeps per condition), in 21 MO patients between attacks and in 17 HVs. We measured parietal N20–P25 amplitudes and we evaluated the ratio ICLI=MU/(M+U)∗100, where MU is the SSEP amplitude obtained simultaneously stimulating both median and ulnar nerves (MU), and M+U is the sum of amplitudes obtained by stimulating each nerve separately (M+U). Habituation was calculated as the slope of the linear regression between the 1st and the 3rd block of 100 averaged sweeps. SSEP N20–P25 amplitudes lack of habituation in MO patients (p =0.03). On grand-average, ICLI resulted similar between groups. However, only when data of HV and MO patients were combined the habituation slope was positively correlated with ICLI (r =0.331, p =0.04). These results suggest that lateral inhibitory mechanisms within somatosensory cortex may contribute to induce interictal lack of habituation of N20–P25 SSEPs amplitude seen in migraine patients. [Copyright &y& Elsevier]

Published
2013
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